The issue is you are going from a flat file system in classic to a table driven database.
So all the data is taken from static files and written to a database.
So the script has a lot of data to convert.
Since it relies on one simple script. I would assume you are running into connection/timeout issues.
And may need to import chunks at a time.
The member stuff is small potatoes. It is the posts that write huge amounts of bytes to the tables.
If UBB was able to convert for you I would think it is well worth the money.
The typical fee is $99.00 ,I am not sure what you were quoted.
