I've been working with Cina in support and we have come to the end of our knowledge.
I am importing a file from TMG 9.05.
I did a fresh install of TMG and of RM
I ran the database maintenance tools in TMG and imported into RM and ran the tools again.
Everything proceeded normally.
In RM I try to create a named group of all the person in my tree (to replicate the related tag in TMG) and the the program hangs at the point of tagging people. Cina and I have both tried the import with the same result.
Does anyone have any suggestions for things I can try? I assume there must be something in the way my TMG database is constructed that RM doesn't like. I would welcome any input.