[petsc-users] Error in using KSPSOperators

[Ivan Luthfi]

Hi there, I have an issue in compiling my code. Here is the warning:

MsFEM_poisson2D_DMDA.c:159:65: error: cannot convert ‘MatStructure’ to
‘Mat’ {aka ‘_p_Mat*’}
  159 |                         ierr =
KSPSetOperators(ksp_direct,up.Af,DIFFERENT_NONZERO_PATTERN);CHKERRQ(ierr);


Please help me
-- 
Best regards,