Internal : Field 'MARKS' is not defined in the collection

#1
Hello,I red two different excel sheets information in to two different collections,when I try to compare collection one field with collection two field it is showing error Internal : Field 'MARKS' is not defined in the collection. Here MARKS is the field name in collection one and collection 2.Could any one help me to solve this problem.
 
#2
Hello,I red two different excel sheets information in to two different collections,when I try to compare collection one field with collection two field it is showing error Internal : Field 'MARKS' is not defined in the collection. Here MARKS is the field name in collection one and collection 2.Could any one help me to solve this problem.

Hi Mahesh

Can you please send the expression what you have written to compare both fields.
 
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