When modifying the units for an analysis, I'm finding that any input box that contains units will not reflect the unit change until I enter some value, then return to edit it.
Example: I bring a model into Nastran In-CAD that begins with English/Imperial units. (i.e. inches, lbf, etc.) I then change my units to a different system, such as "Modified SI", so that I can enter items using millimeters, Newtons, etc. If I attempt to apply a load, it still says lbf. If I add a contact, it still shows the max activation distance in inches. Nothing updates until I enter a number, any number, and click OK. I can then go back into that item to edit it, and I discover that it has been converted into the new unit system.
I've noticed that this seems to primarily affect items that include loads, areas, or inertial properties. Things like the Loads (Forces, Pressures, etc.) exhibit this issue, as do connectors (e.g. cables, rods, etc.). While other areas do not exhibit this issue (mesh settings, thin body offset surfaces, etc.). So, some portions of the UI are switching over to the new unit system, while others seem stuck on the original unit system.
Here's a demonstration of this issue via Screencast:
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