my $map_Cmin = -1; # the first is internal
					my $map_Cmax = -1;
					my $artno_col = -1;
					my $active_col = -1;
					my $colorzones_col = -1;
					my $family_col = -1;
					my $tec_desc_col = -1;
					my $brand_Cmin = -1;
					my $brand_Cmax = -1;
					my $customer_Cmin = -1;
					my $customer_Cmax = -1;
					my $market_Cmin = -1;
					my $market_Cmax = -1;
					my $title_row = -1;