COBOL Manual for TNS and TNS/R Programs

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Procedure Division Verbs

HP COBOL Manual for TNS and TNS/R Programs—522555-006

9-289

USE AFTER EXCEPTION

file-name

is a file description name that is to use this USE statement when an exception

occurs. A given file-name can occur in only one USE statement in a given

program. Sort-merge file description names are not permitted.

INPUT

specifies that all files opened in INPUT mode that are not specified explicitly in

another USE statement are to use this USE statement.

OUTPUT

specifies that all files opened in OUTPUT mode that are not specified explicitly in

another USE statement are to use this USE statement.

I-O

specifies that all files opened in I-O mode that are not specified explicitly in another

USE statement are to use this USE statement.

EXTEND

specifies that all files opened in EXTEND mode that are not specified explicitly in

another USE statement are to use this USE statement.

Usage Considerations:

•

Restrictions

Control statements (ALTER, GO TO, and PERFORM) specified in one logically

discrete area are, with a few exceptions, not permitted to refer to procedure-

names defined within another logically discrete area. For detailed restrictions

and permissions, see ALTER, GO TO, and PERFORM.

Procedure names defined within a nondebugging declarative procedure (and

procedure-names defined within utility sections associated with that declarative

procedure) can be referred to by PERFORM statements located anywhere in

the Procedure Division.

A declarative exception procedure in which the GLOBAL phrase is specified

must not execute an EXIT PROGRAM statement.

Declarative exception procedures apply only to data files, not to sort-merge

files.

•

Implicit and Explicit File Reference

A USE statement that mentions a file by name is said to make an explicit reference

to the corresponding file. A USE statement that mentions an open mode (INPUT,

I-O, OUTPUT, or EXTEND) makes reference to a file implicitly, according to the

mode in which the program opened (or attempted to open) the file.