Export to Excel in Discoverer - Is this a Bug ???

Hi all, thanks for all your helping and sharing thoughts.
I have one issue when exporting to EXcel:-
If you create a calculated field in Discoverer and 1 or more of the values used in the calculation has a NULL value, Discoverer will show a NULL value for the calculated field, which is correct. However when the report is exported to Excel, the calculation for this field is done as if the NULL is a zero causing the calculation to be incorrect. For example:
Ordered_Qty = 20,487
Contract_Amount = NULL
Calculation for new field 'Contract_amt_Remaining' is Contract_Amount - Ordered_ Qty = NULL (since you can not subtract something from nothing , ie NULL - 20,487= NULL) this is fine.
When the new field is exported to Excel the value shows -20,487 as if the Contract_Amt = 0 and not NULL, actually it supposed to show NULL, I don't know why its happening like this.
can anyone help me on this, that would be greatly appreciated.
Thanks in advance,
skat

Hi puppethead,
Thanks for your response,
Here what I am asking is, calculation working fine in Discoverer Plus lik the difference between 2 items, when it is null ie NULL - 3435= NULL this is working well and good in Disc PLUS, but when we export that worksheet to Excel it is giving as ie NULL-3435 = -3435 instead of NULL.
so you guys asking me to use CASE statement in Calculation, but this is not with our calculation part right in Disco Plus, coz we are getting correct result, only when we exporting to Excel getting incorrect value thats it.
Also i tried that CASE statement in calculation, saying syntax error, is that right syntax or not, i used as it is from this post.
Can you make sure that CASE statement is right or not in the above post, do you want me change anything over there, coz I am getting syntax Error.
Thanks again and for your helping.
--skat

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