RSTR statement

The RSTR statement specifies COBOL words that cannot be used in a program, and it can also be used to control the use of nested programs.

RSTR COBOL-word[(0 | 1)] [comments]

By selecting either 1 or 0, you can indicate whether a specific COBOL-word can be used only once, or not at all.

0: Indicates that whenever the specified COBOL-word is used, message 0084 is issued.
1: Indicates that the specified COBOL-word can be used once. If it is used more than once, severe message 0194 is issued.

The following reserved words can be restricted only by using option 1: