After a switch of the PWP process (Administration perspective -> Automation Engine Management -> Right-click running WP that does not have a role -> Choose Server Mode -> Change Mode to PWP), the PWP row shows blank for "Own MQSet" and 1 or 2 for "ZDU Version". Normally it should show 1 or 2 for "Own MQSet" and "B" (base) or "T" (target) for "ZDU Version".
After a restart of the system, or just after startup, the PWP row's Own MQSet and ZDU Version show correctly.
21.0 Automation Engine and AWI 21.0.13 and below
24.X Automation Engine and AWI 24.4.0 and below
This is fixed with 21.0.14 and 24.4.1. This does require the Automation Engine, AWI, Utility, and initialdata be on the same Major, Minor, and Service pack release.