Error getting material

[jbenito]

2011-05-23 15:18:27,823 indico.rpc - ERROR json.py:133 -- Service request failed. Request text:
{"version":"1.1","origin":"https://indico.cern.ch/conferenceDisplay.py?confId=135993","method":"material.get","params":{"confId":"135993","contribId":"1","parentProtected":true,"materialIdsList":{"slides":"slides"},"materialId":"slides"}}

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/interface/rpc/json.py", line 110, in process
    requestBody.get("params", []), req)
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/interface/rpc/process.py", line 85, in invokeMethod
    result = processRequest(method, copy.deepcopy(params), req)
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/interface/rpc/process.py", line 53, in processRequest
    result = handler(params, getSession(req), req).process()
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/implementation/base.py", line 229, in process
    self._checkParams()
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/implementation/material.py", line 82, in _checkParams
    MaterialBase._checkParams(self)
  File "/usr/lib/python2.6/site-packages/indico-0.98_dev-py2.6.egg/MaKaC/services/implementation/material.py", line 77, in _checkParams
    raise ServiceError("ERR-M0", str(e))
ServiceError: ERR-M0 : 'NoneType' object has no attribute 'getConference' (no inner exception)