Execute an external program,

[Andrea]

Hi all           i need to execute an external program from within a Servlet           and i try this code:               private void Instradamento() {    try {          NPL_Parametri par= new NPL_Parametri();             String[] command = {"Instradamento.exe "+par.Username +"/"+par.Password+"@"+par.Host+"             "+progetto+" S "+tipocirc+" "+servizio+" "+cliente+" "+sedeo+" "+seded+" "+codtask};           Process p = Runtime.getRuntime().exec(command);           } catch (Exception e) {           context.log( e.toString() );}          }       but i receive this error:     java.io.IOException: CreateProcess: START.BAT  error=2       I don't understand what means error=2       can you help me ?           Thanks