File Extension SUB File Format Divx Subtitles SUB stands for Divx Subtitles. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Error(55,8): PLS-00103: Encountered the symbol "C1" when expecting one of the following: := . ( @ % ; User sign on new sub system What is use of sub reports?