QuickBASIC is attempting to load a binary file and does not recognize the binary-file format. QuickBASIC recognizes two binary-file formats: 1. QuickBASIC program files 2. Help files This error commonly occurs when QuickBASIC is asked to use an include file that has been saved in compressed format. Include files must be saved in text format, so 1. Reload the include file as a module 2. Save it in text format 3. Run the program again.