I have upgraded from 1.5 to 2.1.8, I haven't seen any errors during the upgrade process.
I went all ok, but now some relations (Domains) doesn't show on the GUI, also it is shown in the log file:
ERROR 2014-03-26 11:32:46 [jsonrpc ] A java.lang.IllegalArgumentException occurred calling method class org.cmdbuild.servlets.json.management.ModCard.getCardList: missing alias SOFTWAREBASE
What could be hapening ?