[[Image:File_name_restriction.png|link=]]
If a Single File Upload field has a File Type Restriction of "pdf", The file name restriction feature is [[Variable processor|variable processor]] compatible for both [[single file]] and a user tries to upload a document with a different extension, they will receive the following message: [[Image:FileTypeRestricted.pngmultiple file|link=multiple file uploads]].
If a Multiple File Upload file has a File Type Restriction of "pdf", and a user tries to upload documents with different extensions, they will receive the following message:
