Unable to call Loaddata.bat from VBscript

Hello, i am trying to use the loaddata.bat tool to launch a data load rule from a custom  vbscript. I am able to launch the batch, but this is the error it returns: Number of arguments: 12 Argument 0: loaddata Argument 1: hypadmin Argument 2: hyperion Argument 3: TESTPCONS Argument 4: Y Argument 5: N Argument 6: STORE_DATA Argument 7: SNAPSHOT Argument 8: N Argument 9: Feb-17 Argument 10: Feb-17 Argument 11: ASYNC Oracle Instance is not defined. It has to be passed as a system argument. Unable to load servlet URL from configuration. Can you help me? I noticed the same behaviour in another environment. Thanks Marco