Sorry, the replying to the answer seems to still be broken. It appears I did not make the problem clear, I can build the case but I can not run the case with the same error as in the title \’OF case has not been built yet\’. As mentioned before I am using OF12 through blueCFD, I assume I have set up the settings file for MantiumFlow correctly as it will build the case and generate a .lh file to run.