[petsc-users] How to change KSP tolerance during SNES steps

[behzad baghapour]

I already did it by changing level of fill of PC of KSP, but I received the
following error:

[0]PETSC ERROR: --------------------- Error Message
------------------------------------
[0]PETSC ERROR: Object is in wrong state!
[0]PETSC ERROR: Cannot change levels after use!
[0]PETSC ERROR:
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