Confusing error from MsiMsp.exe

Had some trouble creating a patch with MsiMsp.exe version 4.00 yesterday.


ERROR: Cannot overwrite patch '%TEMP%\~PCW_TMP.TMP\tempcopy.msp'. Check the permissions to make sure that patchwiz will have access to the file. (Note, this path cannot be a folder.)

The mistake I had made was pretty simple, but the error message above sent me in the wrong direction when trying to solve it. I thought there was a problem creating the temporary file, silly me. The issue was instead that the directory where I wanted the output msp file to be created didn’t exist.

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