need SAP PI/PO mapping logic to display target field as empty if source element/tag not present

Hi All,

I got one mapping issue in run-time i.e. some times my source tag is not present in payload at that time I want display target tag as empty value and I have used below mapping logic's but it doesn't workout.

I have implemented below logic but those are working in test mapping level but while run the hole scenario below logic's are not working.

logic 1:

logic 2:

The above two logic's are not working and can one help me how achieve this issue.

Thank you,

Narasaiah T