If that's Text::CSV's print() method you're referring to, perhaps that documentation may help.

According to the documentation, your first line of code

$csv->print ($fh1, [$ifile, @cols, @matches ]);
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appears to be syntactically correct. Print out the values of those variables, immediately before that line of code, and inspect them: this may help in tracking down your problem.

I've no idea what you're attempting to achieve with "*".@cols. It will concatenate an asterisk with the number of elements in @cols (i.e. @cols in scalar context). Here's an example:

$ perl -wE 'my @cols = qw{a b c}; say "*".@cols'
*3
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Here's some suggestions as to what I think you may want (but I really am guessing here):

$ perl -wE 'my @c = (1,2,3); say "*", @c'
*123
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$ perl -wE 'my @c = (1,2,3); say "*@c"'
*1 2 3
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$ perl -wE 'my @c = (1,2,3); say map { "*$_" } @c'
*1*2*3
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$ perl -wE 'my @c = (1,2,3); say "@{[ map { qq{*$_} } @c ]}"'
*1 *2 *3
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