Checkmk Werk 10253: Fix possible AttributeError exception on "Parameters of service" page

ID: 10253 Title: Fix possible AttributeError exception on "Parameters of service" page Component: WATO Level: 1 Class: Bug fix Version: 1.7.0i1 When trying to view the parameters of a "Number of threads" service while having locally configured rules that were saved with Checkmk before version 1.6, an "AttributeError" crash occurred. The reason is that this ruleset was converted from a single WARN/CRIT parameter set to a more complex set of parameters. The check and rule editor are correctly transforming the old values, but this is not possible on the "Parameters of service" page. Instead of the crash Checkmk now prints an error message with a hint that you can open the rule in question for editing and save it again to fix this issue.