You are unable to access your Quickbooks company file in a multi user environment. Have all users exit Quickbooks. On the server or workstation where the company files are located launch the Quickbooks Database Server Manager. Click Scan to rescan your company data folder where your quickbooks data files are located. Make sure your Quickbooks company file in question is found.
Lauch Quickbooks again and try to access the company file and switch to multi-user mode.
If you are unable to access the company file and are receiving errors 6177 or 6190, etc. delete or rename the .tlg file and the .nd file for the comapny file in question on the server or workstation.
The tlg file is a transaction log file and the nd file is a text file used for multi-user access. Deleteing or renaming both these files will not harm the main comapny file which has a QBW extension. Do not delete or rename the QBW file.
After deleting or renaming the company file launch Quickbooks again and try to access the company file.
It’s a good idea to Rebuild data under Utilities.
Make sure to swtich to multi-user mode.
If you continue to have this problem your company data file may be corrupted.