I'm getting an IOSTAT error code 29 from a read statement. The only documentation I've found says that this is a file not found error, but the file already been opened on a given unit without error. What does IOSTAT=29 mean for a read statement. The code itself works with Composer2011 build 233 although that may be a red-herring! The file was opened as 'SEQUENTIAL', 'BINARY'.