Transformation end routine error

Hello all,

I am trying to write an end routine in transformation if net revenue for document number is greater than 50000 flag X but i am getting an error below is what my code looks like

IF <result_fields>-doc_number IS NOT INITIAL.

IF /BIC/ZNETREVENU > 5000000.

<result_fields>- /BIC/ZFLAG = 'X'.

I am getting error:E:Field "<RESULT_FIELDS>-DOC_NUMBER" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement. "DATA" statement.

Can i please get help in correcting my routine...

Thanks