R44 – SLEEP() has been called. Calling SLEEP blocks the flow in the execution group (WMB)

SLEEP() has been called. Calling SLEEP blocks the flow in the execution group. (WMB)

This following stops the flow for 1 second.
WMB/IIB flows are intended to be stateless. The need for a SLEEP() suggests a design issue.

SET returnValue = SLEEP(1000);