This guide will walk you through fixing the following error that occurs when attempting to add a connection to the QuickBooks Web Connector:

QuickBooks Web Connector error - QBWC1039: Unique OwnerID/FileID pair value required

This error usually occurs in the following scenarios:

  • You previously added a connection to the QuickBooks Web Connector, removed it, and are attempting to add it again for the same QuickBooks company file.

  • You previously added the connection to the QuickBooks Web Connector on another computer for the same QuickBooks company file, removed it, and are now attempting to add it again on a different computer.

If you are also getting the “Unhandled exception has occurred” error

In addition to the error above, some users also encounter the following error at the same time:

QuickBooks Web Connector error - Unhandled exception has occurred in a component in your application. If you click Continue, the application will ignore this error and attempt to continue. Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

If you are encountering this error as well, we must first force-quit the QuickBooks Web Connector before we can fix the other error at the top of this page. To do this, follow the steps below.

  1. Open the Windows Task Manager by searching for “Task Manager” in the Windows search bar (often in the bottom-left corner of your screen).

  2. In the Task Manager, find the QuickBooks Web Connector, right-click it, and select “End Task”.

After force-quitting the QuickBooks Web Connector, continue to the next section to fix the original error for “Unique OwnerID/FileID pair value required”.


Complete the following steps to fix the error shown above for “Unique OwnerID/FileID pair value required”.


Open QuickBooks Desktop


Download the QBWC CP3 tool

Download the QBWC CP3 tool, which Intuit (the makers of QuickBooks Desktop) created to fix this issue. Then open the program (“QBWC_CP3Tool.exe”) from your downloads folder.


Select the QWC file

In the window that opens, as shown below, click “Select File”, find the QWC file that you tried opening earlier that gave you the error shown above, and click “Open”. This file is often found in your downloads folder.

QuickBooks Web Connector - QBWC1039: Unique OwnerID/FileID pair value required

Click "Remove Stamp"


Grant permission to the CP3 tool

QuickBooks Desktop will prompt you to grant permission to the CP3Tool so that it can make a change to fix the issue:

  1. In the QuickBooks Application Certificate window that appears, click “Yes”, then “Continue”.

  2. On the Access Confirmation window, select “Done”.

  3. Follow the instructions, then select “OK”.


Exit the CP3 tool

You should get a confirmation that the Owner ID was removed. Select “OK” and then close the CP3 tool.


Add the connection again

Attempt again to open the same QWC file you tried opening earlier. This time, it should work without any errors and you should see the connection added to the QuickBooks Web Connector.

If you’re still encountering the error shown above after completing all of the steps above, or are having trouble with any of the steps, please email us at