Hm. In that case you'll need to post actual code, that is runnable and demonstrates the problem.

• Actual code:

  Ie. This code: $gdbserver_path :6000 $Exe_path 1> NUL 2> NUL` ; from your OP, is not valid Perl.

  1. There is an unmatched backtick (`) at the end of the line, but none at the start.
  2. Whilst not illegal, a command line parameter that starts ':' is unusual.
  3. You are redirecting both stdout and stderr to nul, then what is the point of backticks? (They are designed to return the output of the spawned program to the spawner.)
  4. Ditto: Why use backticks (rather than system) if you aren't going to assign the output to a variable and use it?
• Runnable: means that we will have a good chance of running the code you post.

  Ie. It mustn't have dependencies that we cannot have access to -- like modules that are your companies intellectual property.

  We don't need to have the executable you are running, we can mock that up using a perl 1-liner.

• demonstrates the problem: hopefully, self explanatory.