c:\test>555304 c:\test>LOOP: 'LOOP:' is not recognized as an internal or external comm operable program or batch file. c:\test>perl 555304.pl Thread 1 Thread 2 Thread 3 Thread 4 Via system: hello world Via system: hello world Via system: hello world Via system: hello world Via backticks hello world Via backticks hello world Via backticks hello world Via backticks hello world Via pipe hello world Via pipe hello world Via pipe hello world Via pipe hello world c:\test>goto LOOP The system cannot find the batch label specified - LOOP #### :LOOP perl 555304.pl goto LOOP