args.addToBody("<pre/>" + cmdString + "</pre>");
context.setVariable("args", cmdString.split(" "));
System.setOut(stdout);
System.setErr(stderr);
try {
new Runner(context).run();
} catch (Throwable t) {
StringBuilder message = new StringBuilder(
"Oops!! I cannot run any further...");
if (t.getMessage() != null) {
message.append(t.getMessage());