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Unable to cast COM object of type 'System.__ComObject' to interface type 'Interop.QBXMLRP2.RequestProcessor2'

You must install the QuickBooks SDK

 

Note: Connex Support Team does not troubleshoot issues directly related to your QuickBooks or local machine. This troubleshooting document is a guide which may resolve your issue, but other questions should be directed to Intuit Support.


Connex Support Team: Scope of Work and Troubleshooting

Problem

When you run the web connector, you get this error:

Unable to cast COM object of type 'System.__ComObject' to interface type 'Interop.QBXMLRP2.RequestProcessor2'

Description

You must install the QuickBooks SDK. Some files are missing.
Download QB SDK 14.
Download QB SDK 15.

Solution

Install the SDK

  1. Go here: C:\Program Files (x86)\Intuit\IDN\QBSDK14.0\tools\installers
  2. Double click QBXMLRP2Installer.exe:
  3. Reboot.
  4. Run the web connector again.