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I think the problem is that you don't need the $ with the -v assignments to hard assign them values. Try it this way:

awk -v col1=3 -v col2=13 '{ if($(col1) != "-" && $(col2) != "-") { print; }}'...

It appears that you are trying to take COL1 and COL2 from the environment; I don't see them defined in your programme, so that was my assumption. Im not sure that is possible. I don't usually use...