Thank you thank you thank you IronManIV! I will try the Quickbooks Database Server Manager.
I've had this problem intermittently for the last 2-3 years. The error says that another user is in single-user mode, which I've verified time-and-again is not the case. It is resolvable by me asking the user on the host computer to "toggle" single-user mode (change from current multi-user mode to single-user mode then back to multi-user mode) and then suddenly I am able to open the company file using my account. But is it a pain and interruption for both me and the other user. It can happen multiple times a day, or just a few times a week, I see no rhyme or reason to the issue.
And you're also right, the boilerplate responses form QB support on this thread and others just runs down a generic list of fixes that I just don't have the confidence to enact. The last thing I want to do is screwup the database while trying to fix an annoyance.
Note to QuickBooks support team - it would be helpful if one of these responses included some explanations of why the issue might be happening, if it's a known issue and under what conditions, and some specific ways to fix it. And please don't respond with the boilerplate "this means a user has the company open in single-user mode" because we know that isn't the case and this wouldn't be a support issue if the program was behaving as designed.
Anyway, thanks again IronManIV. I'll try the QB DB Svr Mgr in the slow season when I have the time (and a screwup followed by a program reinstall and database restore won't kill my business).
