I have the same problem now.
I did a full reinstall of GSX with the liverie update but still no go.
When I ask for service they work a few seconds and then the <unknown> addon error pops-up.
couatl v2.0 (build 2315)
panic log started on Mon Aug 06 20:29:19 2012
Traceback (most recent call last):
File "couatl\common\fsm.py", line 67, in executeDoFuncToCompletion
File "couatl\GSX\assistanceServices\__init__.py", line 212, in do
File "couatl\common\criticalsection.py", line 23, in _synchronized
File "couatl\GSX\assistanceServices\__init__.py", line 79, in requestVehicles
File "couatl\GSX\__init__.py", line 566, in prepareGate
File "couatl\GSX\assistanceServices\__init__.py", line 838, in setGate
File "couatl\GSX\assistanceServices\baseAssistanceVehicle.py", line 71, in setGate
File "couatl\GSX\assistanceServices\baggageLoader.py", line 68, in getSimObjectModel
File "couatl\GSX\assistanceServices\conveyorBelt.py", line 29, in __init__
File "couatl\common\modelCustomization.py", line 90, in checkedData
File "couatl\common\modelCustomization.py", line 81, in validationError
RuntimeError: Error validating key 'pz' of model FSDT_Baggage_Loader_Servisair: required key not found
After the last install and liveries update I get this.
couatl v2.0 (build 2315)
panic log started on Wed Aug 08 08:57:10 2012
Traceback (most recent call last):
File "couatl\common\fsm.py", line 67, in executeDoFuncToCompletion
File "couatl\GSX\assistanceServices\baseAssistanceVehicle.py", line 201, in do
File "couatl\common\simObjectMoverIK.py", line 286, in run
RuntimeError: cruise speed must be positive