The general form of the PAUSE statement is
- PAUSE < message > < * >
The PAUSE statement
- stops execution of the module
- remembers where it stopped executing
- prints a pause message that you can specify
- puts you in immediate mode within the module
environment using the module's local symbol table.
At this point you can enter more statements.
A RESUME statement enables you to continue execution at the
place where the most recent PAUSE statement was executed.
You can use a STOP statement as an alternative to
the RESUME statement to remove the paused states and return to
the immediate environment outside of the module.
You can specify a message in the PAUSE statement
to display a message as the pause prompt.
If no message is specified, IML
displays the following default message:
paused in module \ob XXX\obe
where XXX is the name of the module containing the pause.
To suppress the display of any messages, use the * option:
The followingw are some examples of PAUSE statements with operands:
pause "Please enter an assignment for X, then enter RESUME;";
msg ="Please enter an assignment for X, then enter RESUME;";
When you use the PAUSE, RESUME, STOP, or ABORT
statement, you should be aware of the following details:
- The PAUSE statement can be issued only from within a module.
- IML diagnoses an error if you execute a RESUME
statement without any pauses outstanding.
- You can define and execute modules
while paused from other modules.
- A PAUSE statement is automatically issued if an error
occurs while executing statements inside a module.
This gives you an opportunity to correct the error and
resume execution of the module with a RESUME statement.
Alternately, you can submit a STOP or ABORT
statement to exit from the module environment.
- You cannot reenter or redefine an active (paused) module;
you will get an error for recursive module execution.
- In paused mode, you can run another module that, in
turn, pauses; the paused environments are stacked.
- You can put a RESUME statement inside a module.
For example, suppose you are paused in module A and
then run module B, which executes a RESUME statement.
Execution is resumed in module A
and does not return to module B.
- IML supports stopping execution while in a paused
state in both subroutine and function modules.
- If you pause in a subroutine module that has its own
symbol table, then the immediate mode during the pause
uses this symbol table rather than the global one.
You must use a RESUME or a STOP statement to
return to the global symbol table environment.
- You can use the PAUSE and RESUME statements, in
conjunction with the PUSH, QUEUE, and EXECUTE subroutines
described in Chapter 15, "Using SAS/IML Software to Generate IML Statements," to execute IML
statements that you generate within a module.
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.