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Our software products ONLY work with QuickBooks DESKTOP.  NOT COMPATIBLE WITH QUICKBOOKS ONLINE.

 
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QuickBooks Integrated Application Error Codes & Resolutions

80040422 - This application requires Single User file access

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80040422 - This application requires Single User file access mode and there is already another application sharing data  with this QuickBooks company data file.

Resolving Error Code 80040422

Our products do not require single user file access and this error should not occur, however, we have seen it occur when QuickBooks is performing an automatic update and you are trying to access the QuickBooks file with our software.

 

 

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