IBM DOS/VS COBOL allows the clauses of the I-O-CONTROL paragraph of the ENVIRONMENT division to appear in any order. It also accepts the following forms of the APPLY clause that ACUCOBOL-GT does not accept:
APPLY WRITE-ONLY ON file-name-1 [file-name-2] ...
APPLY EXTENDED-SEARCH ON file-name-1 [file-name-2] ...
APPLY WRITE-VERIFY ON file-name-1 [file-name-2] ...
APPLY CYL-OVERFLOW OF integer TRACKS ON file-name-1 [file-name-2] ...
APPLY CORE-INDEX TO data-name ON file-name-1 [file-name-2]
APPLY {MASTER-INDEX} TO device-number ON file-name-1 [file-name-2] ...
{CYL-INDEX }
These options affect the efficiency of file operations in IBM DOS/VS COBOL but not the program logic. As a result, ACUCOBOL-GT treats these forms of the APPLY clause as comments when in the IBM DOS/VS COBOL compatibility mode, and it accepts the clauses in any order regardless of the mode.
You may put APPLY clauses of the IBM DOS/VS COBOL type into the I-O-CONTROL paragraph, but only when the compiler is in the IBM DOS/VS COBOL compatibility mode. Such clauses are scanned but otherwise ignored.
The clauses of the I-O-CONTROL paragraph may be arranged in any order, and the existing APPLY clause may be used, regardless of the compiler mode.