Amit,
Thanks for your inputs. But this is not the scenario I am talking about. I am aware that N (FileName):1(CustomerValue) mapping can be done. Lets say N is 2 here with value FILENAME1 and FILENAME2.
so I will have one value mapping group for the above.
But now lets says I have a requirement to cerate a new mapping FILENAME1 (only) to DISTRIBUTION CHANNEL1 and FILENAME2 (only) to DISTRIBUTION CHANNEL2.
When I try to create the above I get an error saying FILENAME1 is already being used in Value mapping group 1.