Keithley 2400 Problems

Hi,

I'm trying to run a Keithley 2400 SourceMeter with LabView using the latest driver (Keithley 24XX) and the example VI "Keithley 24XX Read Single.vi".

After selecting the GPIB Adress I run the program and Labview throws the following error message:

Error -1074000000 occurred at Keithley 24XX.lvlib:Error Query.vi

Possible reason(s):

Instrument reports:
-113,"Undefined header"
-230,"Data corrupt or stale"
-420,"Query UNTERMINATED"
0,"No error"

Complete call chain:
Keithley 24XX.lvlib:Error Query.vi
Keithley 24XX.lvlib:Read (Multiple Points).vi
Keithley 24XX.lvlib:Read (Single Point).vi
Keithley 24XX Read Single.vi

I also have a Keithley 2000 Multimeter up and runing with it's latest driver and the example program and it works just fine.

What could be the problem?

Thanks in advance!