Operations Manager failed to check the state of a service.
A rule or monitor tried to check the state of a service but failed to do so. This could be due to a number of reasons
The service does not exist on the computer
The Agent action account does not have permissions to check the service
The rule or monitor is misconfigured
More details of what caused this issue can be found by examining the associated alert context.
Check the rule or monitor name, also check the detailed information about what the error was.
Ensure that the service exists on the computer.
Ensure that the agent action account has permissions on the computer
Check the rule or monitor (workflow name) to ensure that it is properly configured.
The following link will display all events indicating a possible problem with service related events:
View Service Monitoring Events