Hello Neel,

I was able to replicate your Problem. For me ISNULL(EKKO.ZTERM) always returns a 1 or a 0 and ISNULL(EKKO.ZTERM) sometimes returned a -. I think this happens because not every row entry in the EKKO table has a corresponding entry in the LFB1 table, so the value isnt missing so much as it was never supposed to exist in the first place. ISNULL checks the LFB1 Table for missing values, if it has no entry to check it returns a -. If there is no entry in the EKKO table it returns a - by default there is nothing for it to compare. I tested lots of variations on the case when statement for you. I couldnt get it to return Different Terms for the cases where there is no entry in the LFB1 table. But logically Different Terms wouldnt be the case anyway as its not that the terms dont match but rather that they are missing from the LFB1 table. Anyway the following case when statement at least correctly identifies the cases where LFB1 should have an entry but its left empty.

CASE

WHEN ISNULL(LFB1.ZTERM) = 1 AND ISNULL(EKKO.ZTERM) = 0

THEN Different Terms

WHEN ISNULL(LFB1.ZTERM) = 0 AND ISNULL(EKKO.ZTERM) = 1

THEN Different Terms

WHEN LFB1.ZTERM != EKKO.ZTERM

THEN Different Terms

WHEN LFB1.ZTERM = EKKO.ZTERM

THEN Matching Terms

ELSE NULL

END

I hope I could a least help you make sense of the situation.

Best wishes,

Calandra