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Error -16033: Cannot Unregister Solution Extension

Last Modified: November 11, 2019

The Package Builder solution extension (.pbs) could not be unregistered.

Why does this error occur?

When installing Package Builder, the *.pbs file extension is registered with Windows to allow Package Builder solution files to be opened in Package Builder by default. This registration is removed when Package Builder is uninstalled. An unexpected error occurred removing this registration.

How do I resolve this error?

Close all other applications, except NI Package Manager, and uninstall NI Package Builder again with administrator privileges.


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