DTP1.x to DTP2b4 Database Convert Fails

I have a number of DTP1 databases I’d like to use in DTP2b4, one is about 4Gb and I can examine the contents and see the document files there.

However when I try to convert this database to the latest version using DTP2b4 the conversion process, though reporting no errors and running in under a second leaves me with an empty database. I can see the Database in DTP2b4 but it appears to be empty.

One possibly relevant point is that I am storing the databases not in their default location but that shouldn’t matter, should it?

Any suggestions as to what to try?

The location shouldn’t matter if you’re using DEVONthink Pro. Does DEVONthink Pro 1.x report any issues after using Tools > Verify & Repair?