I get the following error when I try to use GAMG on 1 core. I just pulled dev and it still exists.

John

[0]PETSC ERROR: --------------------- Error Message ------------------------------------

[0]PETSC ERROR: Arguments are incompatible!

[0]PETSC ERROR: MatMatMult requires A, mpiaij, to be compatible with B, seqaij!

[0]PETSC ERROR: ------------------------------------------------------------------------

[0]PETSC ERROR: Petsc Development GIT revision: unknown  GIT Date: unknown

[0]PETSC ERROR: See docs/changes/index.html for recent updates.

[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.

[0]PETSC ERROR: See docs/index.html for manual pages.

[0]PETSC ERROR: ------------------------------------------------------------------------

[0]PETSC ERROR: ../src/MUSSEL_exe on a intel-debug named wv.iihr.uiowa.edu by jmousel Fri Mar 29 10:19:44 2013

[0]PETSC ERROR: Libraries linked from /home/jmousel/NumericalLibraries/petsc-hg/intel-debug/lib

[0]PETSC ERROR: Configure run at Fri Mar 29 10:00:56 2013

[0]PETSC ERROR: Configure options --download-blacs=1 --download-metis=1 --download-ml=1 --download-mpich=1 --download-parmetis=/home/jmousel/NumericalLibraries/petsc-hg/parmetis-4.0.2-p3.tar.gz --download-f-blas-lapack=1 --with-cc=icc --download-cmake=1 --with-cxx=icpc --with-fc=ifort

[0]PETSC ERROR: ------------------------------------------------------------------------

[0]PETSC ERROR: MatMatMult() line 8567 in /home/jmousel/NumericalLibraries/petsc-hg/src/mat/interface/matrix.c

[0]PETSC ERROR: PCGAMGOptprol_AGG() line 1335 in /home/jmousel/NumericalLibraries/petsc-hg/src/ksp/pc/impls/gamg/agg.c

[0]PETSC ERROR: PCSetUp_GAMG() line 680 in /home/jmousel/NumericalLibraries/petsc-hg/src/ksp/pc/impls/gamg/gamg.c

[0]PETSC ERROR: PCSetUp() line 890 in /home/jmousel/NumericalLibraries/petsc-hg/src/ksp/pc/interface/precon.c

[0]PETSC ERROR: KSPSetUp() line 278 in /home/jmousel/NumericalLibraries/petsc-hg/src/ksp/ksp/interface/itfunc.c

[0]PETSC ERROR: KSPSolve() line 399 in /home/jmousel/NumericalLibraries/petsc-hg/src/ksp/ksp/interface/itfunc.c