SharePoint Development & Administration + InfoPath

Problem: Access Denied page when uploading files using SharePoint's multiple file upload interface. No details are displayed when the upload fails except the Access Denied page. In my case, this was not related to permission on the site or document library as the Access Denied page suggests. After uploading one of the files using the single file upload interface, an illegal character message displayed. Once the illegal character was removed, bother the single and multiple file upload interfaces were able to upload the file(s) successfully. For more information about illegal/unsupported characters in SharePoint document libraries see Illegal Characters in SharePoint Document Libraries . If a large number of files are being uploaded or migrated into SharePoint, there may be many with filenames containing illegal characters. File rename utilities allow conditional renaming of files to remove or replace characters and strings. See Bulk File Rename files to remove or replace illegal cha...

The following characters are unsupported / illegal in SharePoint document libraries: & " : * ? # {} % ~ / \ Tab If the file name of a document contains any of the characters above, a message will be displayed noting SharePoint's illegal characters. If using the multiple upload interface, the response will be an Access Denied page. See Access Denied when trying to upload multiple files to a SharePoint Library . For details about bulk file renaming if a large number of files and documents contain illegal characters, see Bulk File Rename files to remove or replace illegal characters - allow upload/migration to SharePoint Document Library .