Navision released Attain 3.10 in 2002, same years as Navision Attain 3.01, 3.01a and 3.01b.
It was still primary an update with a lot of bug fixes. Manufacturing is now a serious product for real manufacturing companies.
The changes, where Customer/Vendor Ledger Entries also have a Detailed Ledger Entry were made in the previous version, but works from 3.10.
All in all a very stable version. Unless you had to use the NAS, which was very buggy in this version.
Navision also released a version 3.10a and 3.10b.