HELP! I did a live upgrade last night (test was in Dec). 100 Advanced 4.50 to 2013. For live I only brought over the company data files and converted. Client started working and then told me they had changed custom office, added users, etc. in their 4.50 version and now they weren't showing up in 2013 (duh!). So because they have done work in the 2013 version this morning, and I can't export custom office 4.50 and import to custom office 2013, I made a backup of 2013 and migrated just system files from 4.50, installed product update and third party again. Now my MAS_xxx companies are all in the directory but in company maintenance, they no longer appear. SY_Company has all the data, is there any way to fix the lookup? I can create ABC company and hit activate and the modules appear but the company address, etc., possible preferences, emails, etc don't populate. Sage says we are never to remigrate system files nor are we to make a test install into the live install! So they were not of any help. I'm thinking of renaming all my live companies, remigrating system and companies again, then putting my converted companies back into place. Think that will work or any other ideas?