Seeing a "The rule you are attempting to test is not defined" Error

Question

I am trying to test an Query rule by calling it in an expression rule, and got an error message which says "The rule you are attempting to test is not defined", Iam sure that the query rule is defined as I am using it in one of my process model. Any thoughts?... 
 OriginalPostID-90797 
 OriginalPostID-90797

Navajith K · Accepted Answer

Thank you very much for all you valuable comments.. Terri, yes you are correct, I logged out and logged in again when I got this error message and then tried testing the rule which was not saved and it gave me the test results. I have not faced this issue after this instance.