[petsc-users] odd SNES behavior

[Mark F. Adams]

> 
>  Yikes, the logic of SNES and MG (with dm etc) is getting a bit too convoluted. I would run in the debugger with a break point for MatCreate_MFFD() this will give a hint why it is being used.
> 

#0  0x0000000100fca059 in MatCreate_MFFD ()
#1  0x0000000100eedc34 in MatSetType ()
#2  0x0000000100fc7bc3 in MatCreateMFFD ()
#3  0x00000001012acc90 in MatCreateSNESMF ()
#4  0x00000001012c092e in SNESSetUp ()
#5  0x00000001012c277b in SNESSolve ()

I will keep digging.  This is the first one and it is not in the PC ...