I am upgrading from 6.7.2 classic to 7.0.1 threads, and everything was going smoothly - I have a rather large board, so left the upgrade script on overnight. All tests passed during the 7.0.1 installation and the initial upgrade screens.
In the morning I found that the upgrade script was looping on a single thread - the numbers in the URL kept increasing but the text still said "importing thread xxx..."
Inspecting the MySQL database revealed that the script was creating blank entries (POST_BODY was empty, PARENT_ID was 0, USER_ID was 1) for this thread. I stopped the script since we were getting nowhere.
I know this post might be too vague for anybody to help, but I can provide more specific info as needed. Can anybody help?