PVMT Error message (v1.4.2)

Hello, I am using Capella 1.4.2 with PVMT ‘Add-on’ (PVMT 45.5-DS). When I try and view Propert Values I get the following error message. It only affects a couple of models, both of which were migrated from 1.2.2 -> 1.3 -> 1.4.

Thank you
Jim

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