While I don't have any answers, I hope that someone from PG Music might read and analyse these issues and offer some ways for the O/P to overcome the suggested issues and move forward.

As you have indicated that PG Music Support is involved ("They sounded surprised that it didn't run natively, and promised to pass it on."), it would possibly be beneficial to many others if PG Music identifies the cause and advise on the resolution of these issues.


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