Hello,
it's quite annoying but I still didn't get RapidMiner in my applicatin running

Now I tried NetBeans and it worked well (except the error: "Content is not allowed in prolog").
Running inside NetBeans works, going to the shell and running the jar file produces the error:
...
SEVERE: Cannot read operator description file 'OperatorsCore.xml': no valid XML: null
...
Nevertheless, the program runs until the "Content is not allowed in prolog" error.
Can anyone give me a hint to this message?
(I'm really a quite experienced programmer, but from time to time some programs are really restive!