Thank you very much.

I guess I found a cool solution that I would like to post here.

I have created two connections, one called "ResColumn" and Other "WithoutResColumn"

Then I have created for each a data flow.

Basically when the first one fails (meaning that the file has NO res column ) I send the flow to execute the other data flow.

So on failure of flo1 move to Flow 2

😉

Cheers