Makes the Compiler treat all files opened for I-O or EXTEND as optional. 
  
 
    Syntax:
 
       
      >>-.---.-.----.--OPTIONAL-FILE-------------><
   +-/-+ +-NO-+
 
    Properties:
 
       
       
      
 
           
           
           
             
              | Default: | OPTIONAL-FILE (Dialect) | 
 
             
              | Phase: | Syntax check | 
 
             
              | $SET: | Initial | 
 
          
 
        
 
 
    Dependencies:
 
       
      Set to OPTIONAL-FILE immediately by NORM. Set to NOOPTIONAL-FILE immediately by RM or RM"ANSI". 
      
 
    
Comments:
Under ANSI'85 Standard COBOL, a file is treated as optional only if it has the OPTIONAL phrase in its SELECT statement. For compatibility with the ANSI'85 Standard you must specify the NOOPTIONAL-FILE directive.