qbasic.hlp (Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
File already open
This error is caused by one of the following conditions:
   ■ A sequential-output-mode OPEN statement has been
     executed for a file that is already open.
   ■ A KILL statement refers to an open file.
 
ERR code: 55