ID: 11928 Title: Crash: When service goes Crit or Warn but the respective level is not defined (None) Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 If the upper levels for a service are defined for example as (None, 50.0) and the service goes {CRIT} the service would crash because it cannot display None. This would only occur for legacy check plugins. Now the string "never" is diplayed instead of the respective value.