I just tested a SolidWorks file that has some custom properties with and underscore in the name of the custom property. These are mapped to variables on the data for EDPM that have an underscore in them as well. The other properties are showing up on the data card, except for the ones with the underscore "_" Is the underscore a problem for EPDM?
All of my EPDM variables have underscores and many of them are mapped to custom properties of the same name. I don't have any problems. You have something else going on.
Jim S.