frame #5: 0x00000001112039fd libpetsc.3.011.dylib`::PetscAttachDebuggerErrorHandler(comm=1140850689, line=1243, fun="VecGetSubVector", file="/Users/jolivet/Documents/repositories/petsc/src/vec/vec/interface/rvector.c", num=77, p=PETSC_ERROR_INITIAL, mess="MPI_Allreduce() called in different locations (code lines) on different processors", ctx=0x0000000000000000) at adebug.c:444:10
    frame #6: 0x0000000111205e32 libpetsc.3.011.dylib`::PetscError(comm=1140850689, line=1243, func="VecGetSubVector", file="/Users/jolivet/Documents/repositories/petsc/src/vec/vec/interface/rvector.c", n=77, p=PETSC_ERROR_INITIAL, mess="MPI_Allreduce() called in different locations (code lines) on different processors") at err.c:355:19
    frame #7: 0x00000001110d8c6d libpetsc.3.011.dylib`::PetscAllreduceBarrierCheck(comm=-2080374777, ctn=1, line=1243, func="VecGetSubVector", file="/Users/jolivet/Documents/repositories/petsc/src/vec/vec/interface/rvector.c") at pbarrier.c:28:31
    frame #8: 0x00000001114007fb libpetsc.3.011.dylib`::VecGetSubVector(X=0x00007fe49da14a60, is=0x00007fe49d298260, Y=0x00007fe49e18ee60) at rvector.c:1243:12
    frame #9: 0x0000000111814e6a libpetsc.3.011.dylib`MatMult_Nest(A=0x00007fe49d286860, x=0x00007fe49e17ee60, y=0x00007fe49da14a60) at matnest.c:45:32
    frame #10: 0x00000001114c1246 libpetsc.3.011.dylib`::MatMult(mat=0x00007fe49d286860, x=0x00007fe49e17ee60, y=0x00007fe49da14a60) at matrix.c:2370:10
    frame #11: 0x000000011236d642 libpetsc.3.011.dylib`PCApply_FieldSplit(pc=0x00007fe49ea1b060, x=0x00007fe49e1c1a60, y=0x00007fe49e17ee60) at fieldsplit.c:1261:14
    frame #12: 0x0000000112460b19 libpetsc.3.011.dylib`::PCApply(pc=0x00007fe49ea1b060, x=0x00007fe49e1c1a60, y=0x00007fe49e17ee60) at precon.c:444:10
    frame #13: 0x000000011258596b libpetsc.3.011.dylib`KSP_PCApply(ksp=0x00007fe49dabe260, x=0x00007fe49e1c1a60, y=0x00007fe49e17ee60) at kspimpl.h:281:12
    frame #14: 0x00000001125842ff libpetsc.3.011.dylib`KSPFGMRESCycle(itcount=0x00007ffeec1319e8, ksp=0x00007fe49dabe260) at fgmres.c:166:12
    frame #15: 0x0000000112587099 libpetsc.3.011.dylib`KSPSolve_FGMRES(ksp=0x00007fe49dabe260) at fgmres.c:291:10
    frame #16: 0x00000001125c088d libpetsc.3.011.dylib`::KSPSolve(ksp=0x00007fe49dabe260, b=0x00007fe49daeca60, x=0x00007fe49ea54260) at itfunc.c:764:10
    frame #17: 0x000000011275e916 libpetsc.3.011.dylib`SNESSolve_NEWTONLS(snes=0x00007fe49ea5ec60) at ls.c:225:12
    frame #18: 0x00000001126da830 libpetsc.3.011.dylib`::SNESSolve(snes=0x00007fe49ea5ec60, b=0x0000000000000000, x=0x00007fe49dae3a60) at snes.c:4433:12