calling an external program whitin a servlet

[Andrea]

Hi all   I'm new to servlet and this is my problem:   i must call an external program from a servlet so I use thise code: ------------------------------------------------------------------------------------------- private int Instradamento() {    Process p ;    String parametri;      try {          parametri=pathInstr+" "+par.Username +"/"+par.Password+"@"+par.Host+" "+progetto+" "+codtask+" 1 "+" S "+tipocirc+" "+servizio+" "+cliente+" "+sedeo+"  "+seded+" "+ncirc;          p= Runtime.getRuntime().exec(parametri);          p.waitFor();          p.destroy();          context.log("return code: " + p.exitValue());            return p.exitValue();         }    catch (Exception e) {           context.log(e.toString());             return 1000;        } } -------------------------------------------------------------------------------------------   I try it on Windows NT and all is good but when I try on Unix I get an exit value of 9 and the process don't start also if the permission on the file is good (chmod 777)   someone can help me?   Thanks   Andrea