two consecutive calls for Runtime.getRuntime.exec()

my code contains two consecutive calls for Runtime.getRuntime.exec() as follows:

runtimeref.exec(command1);

runtimeref.exec(command2);

where runtimeref = Runtime.getRuntime();

But only command1 is executed and command2 is not executed.

No exception is thrown.

what can be the reason

[325 byte] By [johnray31a] at [2007-11-26 14:55:17]