DATA Step Call Routines for Macros

CALL SYMDEL Routine

Deletes the specified variable from the macro global symbol table.

Type:

DATA step call routine

Syntax
Details

Syntax

CALL SYMDEL(macro-variable<, option>);

macro-variable

can be any of the following:

the name of a macro variable within quotation marks but without an ampersand. When a macro variable value contains another macro variable reference, SYMDEL does not attempt to resolve the reference.
the name of a DATA step character variable, specified with no quotation marks, which contains the name of a macro variable. If the value is not a valid SAS name, or if the macro processor cannot find a macro variable of that name, SAS writes a warning to the log.
a character expression that constructs a macro variable name.

option(s)

NOWARN: suppresses the warning message when an attempt is made to delete a non-existent macro variable. NOWARN must be within quotation marks.

CALL SYMDEL issues a warning when an attempt is made to delete a non-existent macro variable. To suppress this message, use the NOWARN option.