Hello, There is no VTK format part in the code of the VecView (src/vec/vec/interface/vector.c) function. Therefore TSMonitorSolutionVTK doesn't work either. Best regards, Kirill -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20220426/206fe0b5/attachment.html>