Hello, Due to the pragma-based recognition of properties and class-side annotations for Moose entities we never know if we put the all the needed pragmas and that there was no typing error involved in our custom entities and properties. We only get to know if there is some information missing once we start manipulating the entities in the interface where we may have: 1/ missing information or 2/ nils + DNUs. So, what I am thinking to do is to run my battery of tests on a generated model and the MSE (export and then import) version of the model to see if we didn't lose information in saving the model in an MSE file and getting it back. Do we have such types of tests in Moose: same tests that are run on a model before exporting it and after importing it? regards, Usman