error-of-case-has-not-been-built-yet

OK, thanks for the files. Somehow this is now turning into a mystery. You can see that the mesh does not get created because it cannot find some files. This is super strange though. Unfortunately you will have to send more files.
Please also send the case as it is made by MFlow on your system. Please also list all the steps you take to create and then attempt to run the case. If this still does not help, I think we will need to setup an online session to fix this.