Worfklow error: The element PURCHASINGCONTRACT does not exist in the container

WF template: WS20000077

Settings: All standard

I just simulated the workflow for the first time on an Ides System and i get the error to be

this way.

Task: 20000159

Rule: AC2000026

I have also maintained the customizing for rule, ist Container objects, defined binding.

Could not find much info over the Internet as well

Thank you