Hi Boris,
Sorry for the late response, I was away on a short vacation.
I tried compiling from the command line in Java 5 SDK, but I get no errors. Can you please give me a more precise description of your environment.
The line of code the yield the errors tries to make a cast between AbstractActivity<?> and a the following class:
public class ProposalConversation extends Conversation<ProposalConversation.State>
Conversation is defined as
public class Conversation<StateType> extends AbstractActivity<StateType>
the thing that might be causing the error is that ProposalConversation.State is defined as an enum in the ProposalConversation class (maybe your version of the jdk has a problem with that):
public enum State {Started, Proposed, Accepted, Rejected, Confirmed, Disconfirmed, Done};
Regards,
Cipri Costa