Hello,
Thank you for the information provided. Your problem was very simple and I do not think that this is even worth you spending anything. To save both your time and money, I am adding the solution below. Use the below formula instead of your existing lookup function:
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=IFERROR(VLOOKUP(A2,[[login to view URL]]Sheet1!$A$1:$T$182,6,0),0)
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The above function will only work in excel 2007 and above. If you are using a lower version, you will ahve to use the IF function along with the isna function instead. Please use the below function in case of excel version 2003 or lower
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=IF(ISNA(VLOOKUP(A2,[[login to view URL]]Sheet1!$A$1:$T$182,6,0)),0,VLOOKUP(A2,[[login to view URL]]Sheet1!$A$1:$T$182,6,0))
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Though I am unable to explain much in this restricted window, I will still add that a lookup fucntion is not appropraite for finding an exact match (as wwas the requirement in your case) which is why use of vlookup, Index, offset, or hlookup can be better alternatives.
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Thank you for posting