All documents must be submitted in Adobe PDF (Portable Document Format). If the file you are trying to upload has any other extension on it except “.pdf,” the file is not in the proper format. Another reason why you may be receiving this message is because the user is failing to indicate the full path name for the PDF file that they want to upload. You need to provide the full path name (i.e., c:\My Docs\Documents\Motions.pdf) during the upload process.
Resolving Error Messages