This is a QuickBooks error message, not an LMN error message.
This error is saying that the Estimate is open in QuickBooks already - now if that isn't the case, sometimes if you don't exit out of QuickBooks properly it will lock the program. If you can go into QuickBooks and open the estimate that you are trying to import and make a small change on it and then re-save it, it should fix the problem. If not, try shutting down QuickBooks all together and restarting on the server.
There are two other suggestions that may resolve the error:
- Uninstall and then reinstall QuickBooks. Exit QuickBooks, log back in (single-user mode preferred for troubleshooting) and rerun sync to export Estimate.
- Verify and rebuild data. Verify Data self-identifies the most commonly know data issues within a company file while Rebuild Data self-resolves most data integrity issues that the Verify Data finds. Once verified - exit QuickBooks and log back in (single-user mode preferred for troubleshooting). Rerun sync to export Estimate, if error persists, verify data, then rebuild data. Exit QuickBooks, log back in (single-user mode preferred for troubleshooting), and rerun sync to export Estimate.
If the above recommendations do not resolve the error message, contact QuickBooks support for further assistance.