This has nothing to do with backticks. As you're not showing any code that reproduces the problem, I can't help you further. Maybe consider posting self-contained code that exhibits the problem.

That error message mostly happens if you have a program like the following:

#!/usr/bin/perl -w
use strict;

return 'Hello';
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So you must be doing that somewhere in your code.

Yes I do.

Sorry for not giving sufficient info.
Here is my requirement.

1.Call another(child) script which process a text file and return a value to the main script.

I am calling the second script frm main like this.

 my $cmd=" perl C:\\ia\\getset_build_num.pl -mode get -p $outputname -t $build_num_template -c $build_num_config";
In the second script, I capture the cmd input,exec subroutine and return the value to the main script. Problem arises when returning the value to main script. I am wrong when returning the value. if so what will be the correct value.



  if ($mode eq "get") {
     my ($bld_num,$message)= get_build_number($package,$config_file);
    return $bld_num;
    
  }else{
    my ($set_status,$message) = set_build_number($package,$template,$c
+onfig_file);
    return ($set_status,$message);
  }
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Thanks