Transfer Rule Routine: Assign Date Value into Blank Field

Can anyone help me with regards to writing some ABAP code in a transfer rule so that I can assign "99991231" value into a date characteristics if it is blank?
Many thanks for advance.

I would like to check if the value of EXPIRYDATE is blank in data source. If its value is blank, assign '99991231' to it. Otherwise, it will get the value of EXPIRYDATE in transfer rule. I have rewritten the routine as follows. But there is no effects on the result.
if TRAN_STRUCTURE-EXPIRYDATE IS INITIAL.
RESULT = '99991231'.
else.
RESULT = TRAN_STRUCTURE-EXPIRYDATE.
endif.
Many thanks in advance.

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Message was edited by:
Matt Potts
Message was edited by:
Matt Potts

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Transfer Rule Routine: Assign Date Value into Blank Field

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