[petsc-users] Odd errors on MatCreate call

[Barry Smith]

  First guess is that you don't call PetscInitialize() in your program (that has to be called before any PETSc calls).

   Barry

On Jul 29, 2010, at 2:34 PM, John-Michael Fischer wrote:

> Hi, when I call MatCreate() in my program I get 
> 
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000028
> 0x00000001003866a0 in PetscCookieRegister () 
> 
> which backtraces to (I've censored some of the filenames)
> (gdb) backtrace
> #0  0x00000001003866a0 in PetscCookieRegister () at XXXXXX
> #1  0x00000001002c3a1e in MatMFFDInitializePackage () at XXXXXX
> #2  0x00000001001443d9 in MatInitializePackage () at XXXXXX
> #3  0x00000001002caff6 in MatCreate () at XXXXXX
> 
> 
> My matcreate call is very standard, nothing fancy. 
> 
> If I create a test program (completely separate from this codebase) that only includes petscmat.h I can create, insert, and read from MATMPIDENSE matricies just fine.  Based on this test, I would assume PETSC is installed properly.  Any thoughts on why I would be getting errors creating a Mat in this program?  What is PetscCookieRegister about?
> 
> Thanks!
> John-Michael Fischer
> University of Michigan
> Nuclear Engineering and Radiological Sciences