Lock on command processing program ignored

I want to have only one job runa program at a time. CL Programming
suggests ALCOBJ *EXCL on the program object. In this case, it's a
command processing program that I want to restrict. Calling it directly,
or trying to debug, fail. However, another job can run it through the
command. Is this normal? Is there a way around it?

TIA and glad to be back.
--
Vern Hamberg

Would you like to see a challenging little arithmetic puzzle
that might get you or your kids or grandkids more interested
in math? Go to <http://cgi.wff-n-proof.com/MSQ-Ind/I-1E.htm>

Sillygism--

Something is better than nothing.
Nothing is better than a ham sandwich.
Ergo
Something is better than a ham sandwich.