Archived:Error 1722 or 1721 When Uninstalling LabVIEW 7.1

Updated Feb 5, 2018

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Reported In


  • LabVIEW 7.1.1 Full

Issue Details

I was trying to uninstall LabVIEW 7.1, and I received error 1722 (or 1721) followed immediately by an error 1603 dialog box that asks if I want to continue the operation. How can I uninstall LabVIEW 7.1?


In rare circumstances, this problem occurs when you try to remove certain shared components during uninstallation.

Complete the following steps to resolve this problem.

Using Command Prompt:
  1. Make note of which part of LabVIEW was uninstalling when the error occurred. It usually occurs during the LabVIEW Core-Full part, the LabVIEW 7.1 Runtime Engine part, or during both.
  2. When the error 1603 dialog box prompts you to continue the operation, click the Yes button.
  3. If prompted to restart your computer after the uninstallation completes, click the No button.
  4. For each part that generated an error during the uninstallation, run the corresponding MSI files manually from the CD:
    • LabVIEW Core-Full -- [CD Drive]\components\lvcorefull\lvcorefull.msi (you may also download the files -- see related links below)
    • LabVIEW 7.1 Runtime Engine -- [CD Drive]\components\lvruntimeeng\lvruntimeeng.msi
  5. Click the Repair button.
  6. Run the MSI file for the same part again.
  7. Click the Remove button.
LabVIEW 7.1 should be completely uninstalled.

Using Microsoft Fix-It Utility:

If you are unable to uninstall using National Instruments Package Manager or through instructions above, use Microsoft Fix-It Utility.

Download Microsoft Fix-It Utility and follow instructions in the program to select and uninstall Runtime Engine 7.1.