Hi Manish
This error occurs due to the limitation on Array formulas. In older versions of Excel the Array formulas can't calculate results over large cell ranges (the formula tries to validate and check for items in column A B H I to give you the result). Here is the official comment from MS on this error: http://support.microsoft.com/kb/132221
=SUM(IF('SAP GL'!$A$1:$A$1000='Daily Collection Report'!$B$6,IF('SAP
GL'!$B$1:$B$1000='Daily Collection Report'!$A8,IF('SAP GL'!$I$1:$I$1000='Daily Collection
Report'!$B$5,'SAP GL'!$H$1:$H$1000,0))))
B) Your file in its current setup takes a long time to calculate because of numerous array formulas. Use a Pivot table as it is more efficient.
C) Use a sumif formula to do this you will require an additional column in "SAP GL".
2. Write a Sumif formula in 'Daily Collection Report' and you get the same result. It is efficient but will require additional formulas in the SAP GL sheet. Sample file attached.
Hope this helps.
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Thanks
Karthik Bhat