(gdb) backtrace
#0  0x00002aaaabdff7e9 in PMPI_Comm_size () from /usr/projects/hpcsoft/toss2.1/wolf/openmpi/1.6.3-intel-13/lib/libmpi.so.1
#1  0x00000000007a17f1 in hypre_MPI_Comm_size ()
#2  0x0000000000786500 in hypre_StructGridAssemble ()
#3  0x0000000000781756 in HYPRE_StructGridAssemble ()
#4  0x000000000074a8d1 in hypre_SStructPGridAssemble ()
#5  0x0000000000745579 in HYPRE_SStructGridAssemble ()
#6  0x00000000007419ed in hypre_sstructgridassemble_ ()
#7  0x000000000051aa8d in gr_hypresetupgrid (blockcount=) at gr_hypreSetupGrid.F90:230
#8  0x0000000000518fee in gr_hypregridstatus (blockcount=) at gr_hypreGridStatus.F90:57
#9  0x00000000004291e9 in grid_advancediffusion (ivar=) at Grid_advanceDiffusion.F90:154
#10 0x0000000000461a9c in radtrans (nblk=) at RadTrans.F90:305
#11 0x0000000000412d5b in driver_evolveflash () at Driver_evolveFlash.F90:286
#12 0x0000000000422f96 in flash () at Flash.F90:51
#13 0x000000000040beec in main ()
(gdb) Cannot access memory at address 0x3
Cannot access memory at address 0x3
Cannot access memory at address 0x3
Cannot access memory at address 0x3