Check_mk Discovery UNKN-check failed after 1.6.0p30 installed

Hi Norm
This is the output of the debug:

cmk --debug -vv node76
Check_mk version 1.2.6p12
Connecting via TCP to 10.10.1.111:6556.
User spigatto cannot write to /var/lib/check_mk/counters/node76: [Errno 13] Permission denied: '/var/lib/check_mk/counters/node76'
Traceback (most recent call last):
  File "/usr/share/check_mk/modules/check_mk.py", line 5786, in <module>
    exit_status = do_check(hostname, ipaddress, check_types)
  File "/usr/share/check_mk/modules/check_mk_base.py", line 1106, in do_check
    save_counters(hostname)
  File "/usr/share/check_mk/modules/check_mk_base.py", line 961, in save_counters
    raise MKGeneralException("User %s cannot write to %s: %s" % (username(), filename, e))
__main__.MKGeneralException: User spigatto cannot write to /var/lib/check_mk/counters/node76: [Errno 13] Permission denied: '/var/lib/check_mk/counters/node76'

We are doing reworks around our infrastructure and we will be looking at new versions sometime in the coming months.