When installing ooRexx from the Automation Point (AP) dialog, receive popup:
Automation Point R11.7
Not all AP Services have been stopped.
Check if all the processes related to AP are stopped.
Possibly did a shutdown of AP, but that doesn't always mean all the related AP processes are also stopped.
Check AP Configuration Manager, Expert Interface, Infrastructure, Services.
If servers are still running, these need to be stopped.
Refer the 'Notes' within the Install the Server section in the documentation.