I am testing the classical problem of incompressible flow in a lid-driven cavity by modifing the demo in \demo\documented\navier-stokes. It successed with triangle element but failed with quarilateral. The output of the last step for quadrilateral is correct but it failed to contine.
The error message is:
*** -------------------------------------------------------------------------
*** Error: Unable to solve linear system using PETSc Krylov solver.
*** Reason: Solution failed to converge in 26 iterations (PETSc reason DIVERGED_DTOL, residual norm ||r|| = 1.197099e+05).
*** Where: This error was encountered inside PETScKrylovSolver.cpp.
*** Process: 0
***
*** DOLFIN version: 2019.1.0
*** Git changeset: unknown
