Hi, thanks for the script. I really learn alot from it. But there is a minor problem when i run the script.

#Convert to cvs 
open my $infile_1, "<", $output_1 or die $!;
open my $outfile_1, ">", "clock.sum.rpt.csv" or die $!;
#$header_1 = "Clock,Sinks,Buffers,Cells,Slew,Path,Vio,Area";
my $lines_1;
while(<$infile_1>){
    if(/(\w+|\S+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+.\d+)\s+(\d+.\d+)\s+(\
+d+)\s+(\d+.\d+)/g){
    tr/ /,/s;
    
    print $outfile_1 "$_";
    $lines_1 = $_;
    }else{
    #$lines_1 = $_;
    #warn "WARN: This line does not follow the normal output pattern, 
+";
    }
}

#print $outfile_1 $header_1;
print $outfile_1 "$lines_1\n";
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It shows " Use of uninitialized value $lines_1 in concatenation (.) or string at script_1 line 54, <$infile_1> line 1323." and doesn't allow me to output the csv file. I checked and the line 1323 in my 1st file is a '1'. However this problem does not occur at my 2nd file. Help