Dear Monks, The simplest script #!/usr/bin/perl use strict; use warnings; print "Hello, World...\n"; Works fine in my computer (Printing in the CMD screen "Hello World") but in other computers did not print anything on the screen after installing the same perl version. What is happening?

That's pretty unusual, and I think you'll have to explain exactly how you're calling this script on both computers so we can help you better. Since you say "CMD" I guess this is Windows? Are you using ActivePerl or Strawberry Perl, and what version? When you open the command prompt on both computers and type perl -v, it should output the same thing; that's assuming your PATH environment variable is set up correctly; if for example you're using the portable edition of Strawberry Perl, you'll have to navigate to its folder first (Update: or use its batch file to start the shell). It should also do the same when you type perl scriptname.pl for your script filename. Or, are you double-clicking the scripts to run them? Note that this sometimes requires additional steps to get working. (By the way, please use <code> tags to format code and data.)