Invalid extension(s) in list '<list>' of file type '<filetype>'
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Invalid extension(s) in list '<list>' of file type '<filetype>'

An extension listed in the Extensions property of the specified file type is not a valid file extension. Multiple extensions must be separated by semicolons; it is not necessary to prefix an extension with a period.

To correct this error

  1. Double-click the error in the Task List to go to the referenced file type in the File Types Editor.
  2. In the Properties window, select the Extensions property, and correct any invalid extensions.

See Also

Extensions Property | File Types Management in Deployment

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