- petsc-users - mailman3.cels.anl.gov

How to map global vector to natural vector
by Xu, Donghui 13 Nov '25

13 Nov '25

Dear PETSc Team, I am working with petsc4py for my model. I had some experience of using PETSc in Fortran. In Fortran, I used the following subroutines: call DMPlexCreateNaturalVector(dm, natural, ierr) call DMPlexNaturalToGlobalBegin(dm,natural,X,ierr) call DMPlexNaturalToGlobalEnd(dm,natural,X,ierr) However, I found there are no such interfaces in petsc4py. Can you advise me on how to get the global vector in natural order with DMPLEX in petsc4py? Thanks, Donghui

2 3

Re: [petsc-users] Error in configuring PETSc with Cygwin on Windows by using MS-MPI
by Barry Smith 13 Nov '25

13 Nov '25

Change __attribute__((packed)) to /* __attribute__((packed)) */ in include/petscmath.h and run make again. I think you should install a new version of Microsoft's compilers etc. Barry > On Nov 13, 2025, at 3:53 AM, 程奔 <202321009113(a)mail.scut.edu.cn> wrote: > > Hi Barry > > > > Thanks for your advice. > I use AI help me that change the file on the petsc-3.24.1/arch-mswin-c-opt/externalpackages/petsc-pkg-parmetis-f5e3aab04fd5/headers/gk_arch. > > > The change is from: > > #ifdef __MSC__ > #include "ms_stdint.h" > #include "ms_inttypes.h" > #include "ms_stat.h" > #else > #ifndef SUNOS > #include <stdint.h> > #endif > #if !defined(WIN32) && !defined(__MINGW32__) > #include <sys/resource.h> > #endif > #include <inttypes.h> > #include <sys/types.h> > #include <sys/time.h> > #endif > > To: > > #if (defined(__MSC__) || defined(_MSC_VER)) && defined(_MSC_VER) && _MSC_VER < 1900 > #include "ms_stdint.h" > #include "ms_inttypes.h" > #include "ms_stat.h" > #else > #ifndef SUNOS > #include <stdint.h> > #endif > #if !defined(WIN32) && !defined(__MINGW32__) && !defined(_MSC_VER) > #include <sys/resource.h> > #endif > #include <inttypes.h> > #include <sys/types.h> > #if !defined(_MSC_VER) > #include <sys/time.h> > #endif > #endif > > > > Then I configure the PETSc: > > ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-f5e3aab04fd5.tar.gz --with-strict-petscerrorcode=0 --with-64-bit-indices > > It seems good, but then I make it > > it have the error: > > > > make[3]: *** [gmakefile:211: arch-mswin-c-opt/obj/src/sys/objects/device/interface/mark_dcontext.o] Error 2 > make[3]: Leaving directory '/cygdrive/g/mypetsc/petsc-3.24.1' > make[2]: *** [/cygdrive/g/mypetsc/petsc-3.24.1/lib/petsc/conf/rules_doc.mk:5: libs] Error 2 > make[2]: Leaving directory '/cygdrive/g/mypetsc/petsc-3.24.1' > **************************ERROR************************************* > Error during compile, check arch-mswin-c-opt/lib/petsc/conf/make.log > Send it and arch-mswin-c-opt/lib/petsc/conf/configure.log to petsc-maint(a)mcs.anl.gov <mailto:[email protected]> > ******************************************************************** > make[1]: *** [makefile:44: all] Error 1 > make: *** [GNUmakefile:9: all] Error 2 > > > The new configure.log and make.log is attached below. > > I don't know if it is caused by the change I made or the other problems. > > > > So I ask for your help again. > Looking forward your reply! > > > sinserely, > Cheng. > > > > > > > > -----原始邮件----- > 发件人: "Barry Smith" <bsmith(a)petsc.dev <mailto:[email protected]>> > 发送时间: 2025-11-13 00:03:50 (星期四) > 收件人: 程奔 <202321009113(a)mail.scut.edu.cn <mailto:[email protected]>> > 抄送: PETSc <petsc-users(a)mcs.anl.gov <mailto:[email protected]>> > 主题: Re: [petsc-users] Error in configuring PETSc with Cygwin on Windows by using MS-MPI > > G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(37): error C2371: 'int_fast16_t': redefinition; different basic types > G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(80): note: see declaration of 'int_fast16_t' > G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(41): error C2371: 'uint_fast16_t': redefinition; different basic types > G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(84): note: see declaration of 'uint_fast16_t' > G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(49): warning C4005: 'INT8_MIN': macro redefinition > G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(107): note: see previous definition of 'INT8_MIN' > > Parmetis has its own definitions for many C standard types, etc in headers\ms_stdint.h that duplicate what is available in stdint.h on Unix systems. Normally, this gets included when __MSC_ is defined instead of stdint.h (in gk_arch.h). > > But for some reason, with your system it appears that Microsoft's stdint.h is also getting included; presumably brought in through some other system include file since it is only included in one place. > > $ git grep stdint.h > headers/gk_arch.h: #include "ms_stdint.h" > headers/gk_arch.h: #include <stdint.h> > headers/ms_inttypes.h:#include "ms_stdint.h" > headers/ms_stdint.h:// ISO C9x compliant stdint.h for Microsoft Visual Studio > > You have a fairly old VisualStudio, 2022. Can you upgrade to the latest? Let us know if this resolves the problem. > > Barry > > > > > > > > > > > On Nov 12, 2025, at 5:29 AM, 程奔 <202321009113(a)mail.scut.edu.cn <mailto:[email protected]>> wrote: > > Hi Barry > Thanks for your reply. > I check the package parmetis,and the "petsc-pkg-parmetis-45100eac9301.tar.gz" is form https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… . So I made a mistake about the package. > Then I download the package form https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… and it is "petsc-pkg-parmetis-f5e3aab04fd5.tar.gz" > > > Then the compiler option in configuration is: > ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-f5e3aab04fd5.tar.gz --with-strict-petscerrorcode=0 --with-64-bit-indices > > but it still have the same error: > ********************************************************************************************* > ============================================================================================= > ============================================================================================= > Configuring PARMETIS with CMake; this may take several minutes > ============================================================================================= > ============================================================================================= > Compiling and installing PARMETIS; this may take several minutes > ============================================================================================= > > > ********************************************************************************************* > UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): > --------------------------------------------------------------------------------------------- > Error running make on PARMETIS > > > ********************************************************************************************* > > > The new configure.log is attached below. > So I ask for your help again. > Looking forward your reply! > > > sinserely, > Cheng. > > > > > -----原始邮件----- > 发件人: "Barry Smith" <bsmith(a)petsc.dev <mailto:[email protected]>> > 发送时间: 2025-11-11 23:29:01 (星期二) > 收件人: "Matthew Knepley" <knepley(a)gmail.com <mailto:[email protected]>> > 抄送: 程奔 <ctchengben(a)mail.scut.edu.cn <mailto:[email protected]>>, petsc-users(a)mcs.anl.gov <mailto:[email protected]> > 主题: Re: [petsc-users] Error in configuring PETSc with Cygwin on Windows by using MS-MPI > > > Where/how did you obtain /cygdrive/g/mypetsc/petsc-pkg-parmetis-45100eac9301.tar.gz ? Was it from PETSc ./configure? > > self.version = '4.0.3' > self.versionname = 'PARMETIS_MAJOR_VERSION.PARMETIS_MINOR_VERSION.PARMETIS_SUBMINOR_VERSION' > self.gitcommit = 'v'+self.version+'-p9' > self.download = ['git://https://bitbucket.org/petsc/pkg-parmetis.git','https://bitbucket.org/petsc/pkg-parmetis/get/'+self.gitcommit+'.tar.gz <git://https//bitbucket.org/petsc/pkg-parmetis.git','https://bitbucket.org/petsc/pkg-parmetis/get/'+self.gitcommit+'.tar.gz>'] > > > > On Nov 11, 2025, at 7:35 AM, Matthew Knepley <knepley(a)gmail.com <mailto:[email protected]>> wrote: > > On Tue, Nov 11, 2025 at 4:44 AM 程奔 <ctchengben(a)mail.scut.edu.cn <mailto:[email protected]>> wrote: > Hello, > Recently I try to install PETSc with Cygwin since I'd like to use PETSc with Visual Studio on Windows10 plateform.For the sake of clarity, I firstly list the softwares/packages used below: > 1. PETSc: version 3.14.1 > 2. VS: version 2022 > 3. MS MPI: download Microsoft MPI v10.1.2 > 4. Cygwin > > Quick question: Have you considered installing on WSL? I have had much better luck with that on Windows. > > This seems to be an incompatibility of ParMetis Windows support and your version: > > G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(37): error C2371: 'int_fast16_t': redefinition; different basic types^M > G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(80): note: see declaration of 'int_fast16_t'^M > G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(41): error C2371: 'uint_fast16_t': redefinition; different basic types^M > G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(84): note: see declaration of 'uint_fast16_t'^M > > Thanks, > > Matt > > And the compiler option in configuration is: > ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl > --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz > --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] > --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] > --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec > --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz > --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-45100eac9301.tar.gz > --with-strict-petscerrorcode=0 --with-64-bit-indices --download-hdf5=/cygdrive/g/mypetsc/hdf5-1.14.3-p1.tar.bz2 > > > > > > > but there return an error: > ********************************************************************************************* > ============================================================================================= > ============================================================================================= > Configuring PARMETIS with CMake; this may take several minutes > ============================================================================================= > ============================================================================================= > Compiling and installing PARMETIS; this may take several minutes > ============================================================================================= > > > ********************************************************************************************* > UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): > --------------------------------------------------------------------------------------------- > Error running make on PARMETIS > > > ********************************************************************************************* > > > The configure.log is attached below. > So I write this email to report my problem and ask for your help. > Looking forward your reply! > > > sinserely, > Cheng. > > > -- > What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. > -- Norbert Wiener > > https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uC… > >

1 0

Inquiry about issue when compiling with clang
by Benjamin Chapman 13 Nov '25

13 Nov '25

Hello, We are using PETSc as part of a larger project and are switching from compiling with gcc to using AOCC (clang). However, I am getting an error from my include statements stating that the data type __complex128 is an "unknown type name". The full error log is attached. I found this solution online (FreeFem - PETSc compilation error - libblas.a/liblapack.a cannot be used - FreeFEM installation - FreeFEM<https://urldefense.us/v3/__https://community.freefem.org/t/freefem-petsc-co… >), which says to comment out a line in the petscconf.h header file. Is this a safe fix or is there a more elegant way to go about this? Best, Ben

3 2

Re: [petsc-users] Error in configuring PETSc with Cygwin on Windows by using MS-MPI
by Barry Smith 12 Nov '25

12 Nov '25

G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(37): error C2371: 'int_fast16_t': redefinition; different basic types G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(80): note: see declaration of 'int_fast16_t' G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(41): error C2371: 'uint_fast16_t': redefinition; different basic types G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(84): note: see declaration of 'uint_fast16_t' G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(49): warning C4005: 'INT8_MIN': macro redefinition G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(107): note: see previous definition of 'INT8_MIN' Parmetis has its own definitions for many C standard types, etc in headers\ms_stdint.h that duplicate what is available in stdint.h on Unix systems. Normally, this gets included when __MSC_ is defined instead of stdint.h (in gk_arch.h). But for some reason, with your system it appears that Microsoft's stdint.h is also getting included; presumably brought in through some other system include file since it is only included in one place. $ git grep stdint.h headers/gk_arch.h: #include "ms_stdint.h" headers/gk_arch.h: #include <stdint.h> headers/ms_inttypes.h:#include "ms_stdint.h" headers/ms_stdint.h:// ISO C9x compliant stdint.h for Microsoft Visual Studio You have a fairly old VisualStudio, 2022. Can you upgrade to the latest? Let us know if this resolves the problem. Barry > On Nov 12, 2025, at 5:29 AM, 程奔 <202321009113(a)mail.scut.edu.cn> wrote: > > Hi Barry > > Thanks for your reply. > > I check the package parmetis,and the "petsc-pkg-parmetis-45100eac9301.tar.gz" is form https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… . So I made a mistake about the package. > > Then I download the package form https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… <https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… >.tar.gz <https://urldefense.us/v3/__https://bitbucket.org/petsc/pkg-parmetis/get/v4.… > and it is "petsc-pkg-parmetis-f5e3aab04fd5.tar.gz" > > > > > Then the compiler option in configuration is: > ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-f5e3aab04fd5.tar.gz --with-strict-petscerrorcode=0 --with-64-bit-indices > > > but it still have the same error: > ********************************************************************************************* > ============================================================================================= > ============================================================================================= > Configuring PARMETIS with CMake; this may take several minutes > ============================================================================================= > ============================================================================================= > Compiling and installing PARMETIS; this may take several minutes > ============================================================================================= > > > ********************************************************************************************* > UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): > --------------------------------------------------------------------------------------------- > Error running make on PARMETIS > > > > ********************************************************************************************* > > > > > The new configure.log is attached below. > > So I ask for your help again. > > > Looking forward your reply! > > > sinserely, > Cheng. > > > > > > > > > -----原始邮件----- > 发件人: "Barry Smith" <bsmith(a)petsc.dev> > 发送时间: 2025-11-11 23:29:01 (星期二) > 收件人: "Matthew Knepley" <knepley(a)gmail.com> > 抄送: 程奔 <ctchengben(a)mail.scut.edu.cn>, petsc-users(a)mcs.anl.gov > 主题: Re: [petsc-users] Error in configuring PETSc with Cygwin on Windows by using MS-MPI > > > Where/how did you obtain /cygdrive/g/mypetsc/petsc-pkg-parmetis-45100eac9301.tar.gz ? Was it from PETSc ./configure? > > self.version = '4.0.3' > self.versionname = 'PARMETIS_MAJOR_VERSION.PARMETIS_MINOR_VERSION.PARMETIS_SUBMINOR_VERSION' > self.gitcommit = 'v'+self.version+'-p9' > self.download = ['git://https://bitbucket.org/petsc/pkg-parmetis.git','https://bitbucket.org/petsc/pkg-parmetis/get/'+self.gitcommit+'.tar.gz'] > > > >> On Nov 11, 2025, at 7:35 AM, Matthew Knepley <knepley(a)gmail.com> wrote: >> >> On Tue, Nov 11, 2025 at 4:44 AM 程奔 <ctchengben(a)mail.scut.edu.cn <mailto:[email protected]>> wrote: >>> Hello, >>> Recently I try to install PETSc with Cygwin since I'd like to use PETSc with Visual Studio on Windows10 plateform.For the sake of clarity, I firstly list the softwares/packages used below: >>> 1. PETSc: version 3.14.1 >>> 2. VS: version 2022 >>> 3. MS MPI: download Microsoft MPI v10.1.2 >>> 4. Cygwin >> >> Quick question: Have you considered installing on WSL? I have had much better luck with that on Windows. >> >> This seems to be an incompatibility of ParMetis Windows support and your version: >> >> G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(37): error C2371: 'int_fast16_t': redefinition; different basic types^M >> G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(80): note: see declaration of 'int_fast16_t'^M >> G:\VisualStudio2022\VC\Tools\MSVC\14.37.32822\include\stdint.h(41): error C2371: 'uint_fast16_t': redefinition; different basic types^M >> G:\mypetsc\petsc-3.24.1\arch-mswin-c-opt\externalpackages\petsc-pkg-parmetis-f5e3aab04fd5\headers\ms_stdint.h(84): note: see declaration of 'uint_fast16_t'^M >> >> Thanks, >> >> Matt >> >>> >>> And the compiler option in configuration is: >>> ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl >>> --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz >>> --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] >>> --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] >>> --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec >>> --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz >>> --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-45100eac9301.tar.gz >>> --with-strict-petscerrorcode=0 --with-64-bit-indices --download-hdf5=/cygdrive/g/mypetsc/hdf5-1.14.3-p1.tar.bz2 >>> >>> >>> >>> >>> >>> >>> but there return an error: >>> ********************************************************************************************* >>> ============================================================================================= >>> ============================================================================================= >>> Configuring PARMETIS with CMake; this may take several minutes >>> ============================================================================================= >>> ============================================================================================= >>> Compiling and installing PARMETIS; this may take several minutes >>> ============================================================================================= >>> >>> >>> ********************************************************************************************* >>> UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): >>> --------------------------------------------------------------------------------------------- >>> Error running make on PARMETIS >>> >>> >>> ********************************************************************************************* >>> >>> >>> >>> The configure.log is attached below. >>> >>> So I write this email to report my problem and ask for your help. >>> >>> >>> Looking forward your reply! >>> >>> >>> sinserely, >>> Cheng. >> >> >> >> -- >> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. >> -- Norbert Wiener >> >> https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uC… <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCf…> >

1 0

Error in configuring PETSc with Cygwin on Windows by using MS-MPI
by 程奔 11 Nov '25

11 Nov '25

Hello, Recently I try to install PETSc with Cygwin since I'd like to use PETSc with Visual Studio on Windows10 plateform.For the sake of clarity, I firstly list the softwares/packages used below: 1. PETSc: version 3.14.1 2. VS: version 2022 3. MS MPI: download Microsoft MPI v10.1.2 4. Cygwin And the compiler option in configuration is: ./configure --with-debugging=0 --with-cc=cl --with-fc=0 --with-cxx=cl --download-f2cblaslapack=/cygdrive/g/mypetsc/f2cblaslapack-3.8.0.q2.tar.gz --with-mpi-include=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Include,/cygdrive/g/MSmpi/MicrosoftSDKs/Include/x64\] --with-mpi-lib=\[/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpifec.lib,/cygdrive/g/MSmpi/MicrosoftSDKs/Lib/x64/msmpi.lib\] --with-mpiexec=/cygdrive/g/MSmpi/MicrosoftMPI/Bin/mpiexec --download-metis=/cygdrive/g/mypetsc/petsc-pkg-metis-69fb26dd0428.tar.gz --download-parmetis=/cygdrive/g/mypetsc/petsc-pkg-parmetis-45100eac9301.tar.gz --with-strict-petscerrorcode=0 --with-64-bit-indices --download-hdf5=/cygdrive/g/mypetsc/hdf5-1.14.3-p1.tar.bz2 but there return an error: ********************************************************************************************* ============================================================================================= ============================================================================================= Configuring PARMETIS with CMake; this may take several minutes ============================================================================================= ============================================================================================= Compiling and installing PARMETIS; this may take several minutes ============================================================================================= ********************************************************************************************* UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): --------------------------------------------------------------------------------------------- Error running make on PARMETIS ********************************************************************************************* The configure.log is attached below. So I write this email to report my problem and ask for your help. Looking forward your reply! sinserely, Cheng.

5 4

Two SNES on the same DM not working
by Samuele Ferri 07 Nov '25

07 Nov '25

Dear petsc users, in petsc version 3.24, I'm trying to create two snes over the same DM, but with different functions and jacobians. Despite making different calls to SNESSetFunction it happens the second snes uses the same function of the first. Can you help me finding the problem, please? Here below there is a minimal working example showing the issue: static char help[] = "Test SNES.\n"; #include <petscsys.h> #include <petscdmda.h> #include <petscsnes.h> PetscErrorCode Jac_1(SNES snes, Vec x, Mat J, Mat B, void *){ PetscFunctionBegin; printf("Jac 1\n"); PetscFunctionReturn(PETSC_SUCCESS); } PetscErrorCode Function_1(SNES snes, Vec x, Vec f, void *){ PetscFunctionBegin; printf("Function 1\n"); PetscFunctionReturn(PETSC_SUCCESS); } PetscErrorCode Jac_2(SNES snes, Vec x, Mat J, Mat B, void *){ PetscFunctionBegin; printf("Jac 2\n"); PetscFunctionReturn(PETSC_SUCCESS); } PetscErrorCode Function_2(SNES snes, Vec x, Vec f, void *){ PetscFunctionBegin; printf("Function 2\n"); PetscFunctionReturn(PETSC_SUCCESS); } int main(int argc, char **argv) { PetscFunctionBeginUser; PetscCall(PetscInitialize(&argc, &argv, NULL, help)); DM dm; PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 100, 1, 1, NULL, &dm)); PetscCall(DMSetFromOptions(dm)); PetscCall(DMSetUp(dm)); SNES snes1, snes2; Vec r1,r2; Mat J1, J2; PetscCall(DMCreateGlobalVector(dm, &r1)); PetscCall(DMCreateGlobalVector(dm, &r2)) PetscCall(DMCreateMatrix(dm, &J1)); PetscCall(DMCreateMatrix(dm, &J2)); PetscCall(SNESCreate(PETSC_COMM_WORLD, &snes1)); PetscCall(SNESCreate(PETSC_COMM_WORLD, &snes2)); PetscCall(SNESSetType(snes1, SNESNEWTONLS)); PetscCall(SNESSetType(snes2, SNESNEWTONLS)); PetscCall(SNESSetFromOptions(snes1)); PetscCall(SNESSetFromOptions(snes2)); PetscCall(SNESSetFunction(snes1, r1, Function_1, NULL)); PetscCall(SNESSetFunction(snes2, r2, Function_2, NULL)); PetscCall(SNESSetJacobian(snes1, J1, J1, Jac_1, NULL)); PetscCall(SNESSetJacobian(snes2, J2, J2, Jac_2, NULL)); PetscCall(SNESSetDM(snes1, dm)); PetscCall(SNESSetDM(snes2, dm)); PetscCall(SNESSolve(snes1, NULL, NULL)); PetscCall(SNESSolve(snes2, NULL, NULL)); printf("snes1 %p; snes2 %p\n", snes1, snes2); SNESFunctionFn *p; PetscCall(SNESGetFunction(snes1, NULL, &p, NULL)); printf("snes1: pointer %p, true function %p\n", *p, Function_1); PetscCall(SNESGetFunction(snes2, NULL, &p, NULL)); printf("snes2: pointer %p, true function %p\n", *p, Function_2); PetscCall(PetscFinalize()); PetscFunctionReturn(PETSC_SUCCESS); }

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Fortran program compilation hangs with new PETSc version
by Hom Nath Gharti 06 Nov '25

06 Nov '25

I compiled the latest version of PETSc (3.24.1) and attempted to compile my package, which uses Fortran and MPI. But the compilation of my package hangs forever. I tried it on a different cluster with the same behaviour. The compilation precisely hangs when linking to the PETSc program. It seems to be entering into some sort of infinite loop. This problem did not happen with PETSc 3.22.4. I tried with GCC versions 11 and 12. Any advice would be greatly appreciated. Best, Hom Nath

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norm of KSPBuildResidual does not match norm computed from KSPBuildSolution
by Moral Sanchez, Elena 04 Nov '25

04 Nov '25

Hi, I am running CG with a Jacobi preconditioner. I have a monitor function that prints the residual and saves the solution at every iteration. To get the solution at every iteration, I am using the function KSPBuildSolution. I am setting the KSP norm as UNPRECONDITIONED. The convergence test is consistent with the 2-norm of KSPBuildResidual. However this norm does not match the 2-norm of the residual computed explicitly from the solution (obtained with KSPBuildSolution). It also does not match the preconditioned norm. What norm is it computing? When the CG is not preconditioned, the norm of KSPBuildResidual and the norm of the residual computed from the solution match, as I expected. This is KSPView(): KSP Object: 1 MPI process type: cg variant HERMITIAN maximum iterations=100, nonzero initial guess tolerances: relative=1e-08, absolute=1e-08, divergence=10000. left preconditioning using UNPRECONDITIONED norm type for convergence test PC Object: 1 MPI process type: jacobi type DIAGONAL linear system matrix = precond matrix: Mat Object: 1 MPI process type: nest rows=524, cols=524 Matrix object: type=nest, rows=3, cols=3 MatNest structure: (0,0) : type=mpiaij, rows=176, cols=176 (0,1) : NULL (0,2) : NULL (1,0) : NULL (1,1) : type=mpiaij, rows=172, cols=172 (1,2) : NULL (2,0) : NULL (2,1) : NULL (2,2) : type=mpiaij, rows=176, cols=176 Cheers, Elena Moral Sánchez

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Segmentation violation in DMSwarmMigrate(sdm_, PETSC_TRUE)
by prateekgupta1709＠gmail.com 04 Nov '25

04 Nov '25

Hi, I am writing a basic particle tracking code with an existing periodic DMDA. All velocity calculations and position updates work fine but migration throws segfault. I have checked and particles are within the periodic box as well. I discovered that there is an internal field for coordinates which has to be defined using its identifier instead of explicitly registering a field. I am not registering any velocity field (using external vectors). Is there something I am missing? Thanks, Prateek

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Call for Survey Participants: Exploring Teamwork and Software in Scientific Computing
by McInnes, Lois Curfman 28 Oct '25

28 Oct '25

Hello PETSc users – Our research team is conducting survey research to understand perceptions of teamwork, AI, and software in scientific computing. As a member of the scientific computing community, your perspective is invaluable. We are reaching out to invite you to share your point of view on teamwork and software in scientific computing via an online survey. You can complete this survey at a time and place of your choosing. Participation in this research will take approximately 15 minutes. If you are interested in contributing your perspectives to this research, use the following link to access the survey: https://urldefense.us/v3/__https://umt.co1.qualtrics.com/jfe/form/SV_6uicew… <https://urldefense.us/v3/__https://gcc02.safelinks.protection.outlook.com/?… >. Please reach out to our research team with any questions you may have pertaining to this study. Feel free to share this call for participants with your network. The survey is open to all adults who work in scientific computing. This survey will remain open until mid-December. Thank you very much for your time and consideration, Research Team Olivia B. Newton, University of Montana (olivia.newton(a)umt.edu<mailto:[email protected]>) Lois Curfman McInnes, Argonne National Laboratory (curfman(a)anl.gov<mailto:[email protected]>) Anshu Dubey, Argonne National Laboratory (adubey(a)anl.gov<mailto:[email protected]>) Denice Ward Hood, University of Illinois (dwhood(a)illinois.edu<mailto:[email protected]>)

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