Alert is triggered daily even if there are no error messages

Hi,

I have done Alert Configuration for a service with the help of a document from SCN. It is successful when an error occurs.

But I get an alert email Daily(even when there are no errors) and the message and service details mentioned in the mail will be blank.

eg: Below are the error message details

MessageID:

Service:

I want the mail to be triggered only when there is an error message.

So could someone please help with the solution or guide me with the links of documents or threads that can provide the solution.

Thanks In Advance