Hi Andreas, thanks for your reply.
I created two rules for disabling active checks but that did not help.
Rule 1: Host name is A, Service name begins with “Task”, Disable active checks
Result: Half of the hosts Task checks is OK, half is WARN.
Rule 2: Host name is b, Service name is not Check_MK, Disable active checks
Result: Half of the hosts File checks is OK, half is WARN.
The state seems to be unsteady. The checks which are WARN at the moment could change back to OK in a few minutes while others switch from OK to WARN.
What would suddenly cause this behaviour? And why would it be necessary to change things that worked fine forever since? I’m pretty confused…