[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