Howto create a generic text log (alert)
From Authoring, right click on "rules", and select "Create a new rule..."
Select "Generic Text Log (Alert)", and your target management pack
Enter the rule name, and description. Hit Select to pick a target.
In this case, I am selecting the "Windows Server" Target.
Enter the location of the log. If you expect the log file to change names (ie test07072007.log), you could use something like test*.log. This pattern should only match 1 active log at a time
On the next screen, enter in "Params/Param" into the Parameter box. For operator, enter what you need, I used "Matches wildcard" in this example.. For value, enter the text you are looking for.
Modify your alert priority/severity and description, then click create.