285   Problem  problem;  member
295   if (!mon->problem->solution) PetscFunctionReturn(PETSC_SUCCESS);  in MonitorError()
296   PetscCall((*mon->problem->solution)(t, mon->x, mon->problem->data));  in MonitorError()
314   Problem           problem;  in main()  local
349   PetscCall(PetscNew(&problem));  in main()
350   problem->comm = MPI_COMM_WORLD;  in main()
356     PetscCall((*pcreate)(problem));  in main()
363   PetscCall(MatSetSizes(A, problem->n, problem->n, PETSC_DETERMINE, PETSC_DETERMINE));  in main()
371   mon.problem = problem;  in main()
380   PetscCall(TSSetIFunction(ts, NULL, problem->function, problem->data));  in main()
381   PetscCall(TSSetIJacobian(ts, A, A, problem->jacobian, problem->data));  in main()
382   PetscCall(TSSetMaxTime(ts, problem->final_time));  in main()
391   PetscCall((*problem->solution)(0, x, problem->data));  in main()
423   if (problem->destroy) PetscCall((*problem->destroy)(problem));  in main()
424   PetscCall(PetscFree(problem));  in main()