Easiest way is to get the diagnostic data from vShield/vCNS Manager:
Collecting diagnostic information for VMware vShield Manager
http://kb.vmware.com/kb/1029717/
The output is a .gz (i think). so unpack that.
Then search the file for the exact line or relative time stamp. If you grep the "id to load is required for loading", I think you should find it in the logs at a similar time stamp to vCloud Director.