IBM Tivoli NetView for z/OS Programming: Pipes - IBM notice

The CORRWAIT stage does not insert any messages because there is no prior
command to generate them, but CORRWAIT does not wait unless there is some
stage connected to its output stream.
Example: Discarding Pipeline Contents
To run the LIST command, store the results in variables named MYVAR1,
MYVAR2, and so forth, discard the pipeline contents, and add and display a text
message, code the following instructions in a command list:
HOLETEST CLIST
&CONTROL ERR
*
* NETVIEW COMMAND LIST LANGUAGE
*
PIPE NETVIEW LIST STATUS=TASKS +
| STEM MYVAR +
| HOLE +
| LITERAL ?HOLETEST IS RUNNING? +
| CONSOLE
*
&EXIT
PIPE HOLE
Chapter 2. Pipeline Stages and Syntax 139