RE: Dynamics GP 2016 0 - Customization Maintenance Duplicate Name appears in the list
Same problem here in GP2018 R2. I have a number of Package files (one per Form or Report) which I have imported to a fresh install (no DIC files in the Data folder) which I imported via the Customization Maintenance window. Oddly, I have duplicates for all types of artifacts which relate to VBA (Reference, User Form, Modified Form / Form with VBA as per original poster, etc), but only for the Project Accounting product. Our VBA stuff in other products appear fine. When I try to export the duplicates both are identical except in the case of some which are as described in the original post (duplicate with Modified Form / Form with VBA). In those cases the second instance returns the not found error.
We have modifications for the Human Resources product (these are fine), Microsoft Dynamics GP product (also fine), Project Accounting (many duplicates), SmartList (fine) and for a third party vendor which contain no VBA (which are fine).
I have yet to test whether there is actually any impact to functionality, but it is a rather annoying bug nevertheless. Any suggestions?