Hi Gregor, I have checked this, the code is using mpi.h not mpif.h. *Dr. D. P. S. L. Kameswari* On Fri, 17 Oct 2025, 5:56 pm Gregor Corbin via discuss, <[email protected]> wrote:

Hi,

let me guess: this code uses `include mpif.h` and is compiled with gfortran. If so, try to add `-fallow-argument-mismatch' to your compiler flags.

Explanation: With the include file, there are no explicit interfaces and the compiler generates an implicit interface from the call to `MPI_IRECV`. Having two calls with different argument types is an error since some gcc version (10 IIRC).

Cheers,

Gregor Corbin

On 17.10.25 13:30, phani sri via discuss wrote:

Hi all, I am trying to run FLASH4. 8, where I am getting the following error. Can someone please, suggest to me why this error is coming. Thank you in advance. 497 | Call MPI_IRECV(parentt(1,i),2,MPI_INTEGER, & ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization.

ZjQcmQRYFpfptBannerEnd Hi all, I am trying to run FLASH4.8, where I am getting the following error. Can someone please, suggest to me why this error is coming. Thank you in advance. 497 | Call MPI_IRECV(parentt(1,i),2,MPI_INTEGER, & | 2 ...... 633 | Call MPI_IRECV(buffert(1,i),buf_size, & | 1 Error: Type mismatch between actual argument at (1) and actual argument at (2) (REAL(8)/INTEGER(4)). amr_migrate_tree_data.F90:642:23:

497 | Call MPI_IRECV(parentt(1,i),2,MPI_INTEGER, & | 2 ...... 642 | Call MPI_IRECV(newchildt(i),1,MPI_LOGICAL, & | 1 Error: Type mismatch between actual argument at (1) and actual argument at (2) (LOGICAL(4)/INTEGER(4)). amr_migrate_tree_data.F90:717:23:

513 | Call MPI_SSEND (new_loc(1,i),2,MPI_INTEGER, & | 2 ...... 717 | Call MPI_SSEND(buffer(1),buf_size,amr_mpi_real, & | 1 Error: Type mismatch between actual argument at (1) and actual argument at (2) (REAL(8)/INTEGER(4)). amr_migrate_tree_data.F90:725:23:

513 | Call MPI_SSEND (new_loc(1,i),2,MPI_INTEGER, & | 2 ...... 725 | Call MPI_SSEND(newchild(i),1,MPI_LOGICAL, & | 1 Error: Type mismatch between actual argument at (1) and actual argument at (2) (LOGICAL(4)/INTEGER(4)). amr_migrate_tree_data.F90:260:25:

260 | Call MPI_IRECV(buffert(1,i),buf_size, & | 1 ...... 497 | Call MPI_IRECV(parentt(1,i),2,MPI_INTEGER, & | 2 Error: Type mismatch between actual argument at (1) and actual argument at (2) (REAL(8)/INTEGER(4)). amr_migrate_tree_data.F90:269:25:

269 | Call MPI_IRECV(newchildt(i),1,MPI_LOGICAL, & | 1 ...... 497 | Call MPI_IRECV(parentt(1,i),2,MPI_INTEGER, & | 2 Error: Type mismatch between actual argument at (1) and actual argument at (2) (LOGICAL(4)/INTEGER(4)). amr_migrate_tree_data.F90:330:25:

330 | Call MPI_SSEND(buffer(1),buf_size,amr_mpi_real, & | 1 ...... 513 | Call MPI_SSEND (new_loc(1,i),2,MPI_INTEGER, & | 2 Error: Type mismatch between actual argument at (1) and actual argument at (2) (REAL(8)/INTEGER(4)). amr_migrate_tree_data.F90:338:25:

338 | Call MPI_SSEND(newchild(i),1,MPI_LOGICAL, & | 1 ...... 513 | Call MPI_SSEND (new_loc(1,i),2,MPI_INTEGER, & | 2 Error: Type mismatch between actual argument at (1) and actual argument at (2) (LOGICAL(4)/INTEGER(4)). amr_restrict_ec_genorder.F90:310:37:

-- *Dr. D. P. S. L. Kameswari*

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