Knowledge Base

Why am I getting a Target Of Invocation error?

You may receive an error stating "Exception has been thrown by the target of an invocation" when attempting to upload a report through the Rels VSS Connection or generate a MISMO XML file.

This error indicates your PDF-XChange printer driver is missing or corrupt, and need to be reinstalled. Click here to download and run a script that will automatically perform the steps below for you. If you are still experiencing problems, please attempt to follow the steps below manually.

1. Close Appraise-It and any associated dialogs (i.e. the Rels VSS Connection or the MISMO XML wizard).
2. Browse to your installed printers.

  • In Windows XP, go to Start ⇨ Control Panel ⇨ Printers and Faxes.
  • In Windows Vista, go to Start ⇨ Control Panel ⇨ Printers.
  • In Windows 7, go to Start ⇨ Control Panel ⇨ Devices and Printers.
  • In Windows 8, go to the Start screen and type "devices and printers", then hit "Enter".
  • In Windows 10, click the Windows icon on your toolbar, click on the "cog" icon to bring up Settings.  Then click Devices ⇨ Printers & Scanners.

3. Find and delete the PDF-XChange 3.0 and PDF-XChange for SFREP printers, then close the window.
4. Open your list of installed software.

  • In Windows XP, go to Start ⇨ Control Panel ⇨ Add/Remove Programs.
  • In Windows Vista or Windows 7, go to Start ⇨ Control Panel ⇨ Programs and Features.
  • In Windows 8, go to the Start screen and type "programs and features", then hit "Enter".
  • In Windows 10, click the Windows icon on your toolbar, click on the "cog" icon to bring up Settings.  Type Control Panel in the search bar at the top of the settings window and click on control panel in the results to open it.  Click on Programs and Features.

5. Once the list of software installed on your computer populates, scroll down and find PDF-XChange 3. Uninstall it. (If there is more than one, uninstall them all.)
6. When the uninstall is complete, you will be asked to reboot your computer. This is not necessary; click No.
7. Scroll up in your list of installed software and find Appraise-It. Select it and click Change to load the Appraise-It installer.
8. You will see a screen stating that PDF-XChange needs to be installed. Click Next.
9. When you see a screen prompting you to select an installation method (Add/Remove Features, Repair/Reinstall, or Uninstall), close the installer by clicking Cancel or the red X at the top of the window. 

You can now reopen Appraise-It and continue with your work.

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Last Updated
July 09, 2019