Assuming that your delimiter is in $delimiter then: 

if ( $row =~ /(?:^|\Q$delimiter\E)[^\Q$delimiter\E]{256,}(?:\Q$delimit
+er\E|$)/ ) {
    print "Field greater than 255 characters in Row:\n\t$row\n";
    }

[download]

In reply to Re^2: Checking the length of all row elements by jwkrahn
in thread Checking the length of all row elements by paragkalra

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