@LiXiangTang  To check if a post has data in a when rule, you can use the hasMessages function in your when rule. This function checks if there are any messages (errors, warnings, or information) associated with a property or a step page. If there are messages, the function returns true; otherwise, it returns false. Please ensure that the data page D_pzFeed is correctly configured and loaded with the necessary data before calling it in your when rule.

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Is there another/easy way to get pzinskey for a rule?

Cannot reference a Data Page .pxResultsCount property in a when rule from a

Pega Platform 8.4.5 Patch Resolved Issues