[petsc-users] Petsc error: cannot chang local size of Amat after use old sizes 10 10 new sizes 11 11

[我]

Hello all,
I use the function MatCreateMPIAIJWithArrays to construct my matrix. But the number of local rows m and local columns n may change during the timestep advancing.  When the local size changes, the error like "Petsc error: cannot chang local size of Amat after use old sizes 10 10 new sizes 11 11" will appear. Any suggestions about it ?
Thank you very much!
Daye
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