Linux app shared memory problem

[Per olof Ljungmark]

Trying to run a Linux app under 9-STABLE. I can start it once and stop 
it once but all subsequent efforts produces a core dump.

I believe the reason being that this app stores licensing information in 
shared memory and when it stops first time it fails to remove this info.

Is there a sysctl parameter that would be useful in a case like this?

Thanks,