How to Change Existing File Type Associations to New ProgramsLast reviewed: December 9, 1997Article ID: Q129050 |
The information in this article applies to:
SYMPTOMSWhen you try to add a file type to the Registered File Types list, you receive the following error message, even if you cannot find the file extension in the list:
The extension '.<EXT>' is already in use by file type '<Name>'. Choose another extension. CAUSEMultiple file types can be registered to one application. In this case, the file type does not appear in the Registered File Types list, but instead appears in the details for another registered file type. For example, the registered file type Microsoft Word 6.0 Document can contain .RTF, .DOC, and .DOT extensions. Even though these file types do not appear in the Registered File Types list, they are registered to Microsoft Word 6.0.
RESOLUTIONTo change the association of a file type that does not appear in the Registered File Types list, follow these steps:
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