human: How can a File Naming Convention Error be fixed?
assistant: To correct file naming errors (EX: Filename.pdf), be sure to start your file name with [A thru Z, a thru z, or 0 thru 9] and make sure that file names do not use brackets or commas. Also do not start a file name with an underscore or hyphen. The last 4 characters of the file name must be lowercase .pdf (EX: .pdf, .txt or .zip). The file name can consist of any combination of characters selected from uppercase alphabet, lowercase alphabet and/or digits zero through nine: [A thru Z, a thru z, or 0 thru 9, _, -] Do not use brackets, commas, spaces or symbols; you can use an underscore or a hyphen within file name.
The length of file name is limited to a maximum of 100 characters including the required 4 character .pdf, .txt or .zip file extension. For more information please visit http://www.uspto.gov/patents/process/file/efs/guidance/infofiles.jsp