SET FLUSH-FUNCTION TO TRUE  CALL "I$IO" USING IO-FUNCTION                    allFiles             GIVING returnCode  | 
allFiles  | bit value. Can be set to one of the following values (defined in isfilesys.def):  | |
FA-MASS-UPDATE  | if all_files and FA-MASS-UPDATE are not 0, then MASS-UPDATE files should be synced.  | |
FA-REMOTE  | if all_files and FA-REMOTE are not 0, then remote files should be synced.  | |
>0  | Operation successful.  | 
0  | Operation failed.  |