HP-UX CheckMK inventory check in UNKNOWN state

Hello all! Got issue on 2 hp-ux which configured as cluster item in checkmk. on each node checkmk inventory check in unknown state, with description about UNKN - check failed - please submit a crash report!
on this hosts installed agent ver 1.2.8p13, there are few hp-ux and this issue now only on this two.
it caused after manipulations with init.d service by administrators. any advices what to check?

Have you tried running the check_mk_agent local to the HP-UX box? Possibly adding the --debug flag?