Thanks for the quick reply! I have tried the options you have suggested but I have not had success. When I attempt to set problem.conf.options.save_steps, I find that the options dictionary is apparently empty. I have attached a simplified version of my working 2D diffusion code and mesh for reference. The line-numbers where I am attempting to investigate and set the save_steps parameter are at 217-221. Please let me know if you have any further advice! Dumping a .vtk every timestep for my simulation run-time builds up gb's of data rather quickly.