[petsc-users] SNES never called user FormJacobian in debugging mode

[Tian(ICT)]

I encountered a strange problem.
I am using VC2008. When I debuged the code line by line using the VC, the user FormJacobian was never called, instead, the SNES seems use matrix free Jacobian. But if I run the code in command line (no debugger attached), the log file showed that the user FormJacobian was called. What is the reason for this?

-Rong
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