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Trying to load an assembly into modeling from Model Manager.
I had a similar issue when migrating Pro/E file into an SAP based PLM system. Some parameters in older Pro/E files included special characters like °, ± or Ø, but they were expressed as combinations of special control characters in Pro/E. For instance <CTRL-A>$ <CTRL-A> =°, <CTRL-A># <CTRL-A>=± and <CTRL-A> n <CTRL-A> =Ø. You need to replace the combinations of special control characters with standard ascii characters. Perform a search for the dollar sign, or number sign in your metadata to see if any of those combinations are present in your .xml file