I was compiling a cab for a Windows Mobile install when I came across an unexpected error.

Windows CE CAB Wizard    ?Error: Line  92 - unsupported DirID 0  Error: File c:\users\joeljo~1\appdata\local\temp\wizb912.inf contains DirIDs, which are not supported

It took a little while to figure out what this means. Searching on the web I found this can happen if you package more than 1000 files in a cab (or more than 262 in some cases). That wasn’t the cause of the problem that I was encountering though. It took a little while and I finally figured out what was causing it. One of the registry keys had a typographical error in it. I had typed “%InstallDir” instead of “%InstallDir%”. So if you ever encounter this problem remember to double check your registry key names.

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