Error while running my own protocol

This error(SplitObject unknown) tells that you not yet successfully compiled ns2 with your new protocol/agent. So, if you are referring your new protocol/agent in a tcl simulation code, it will say “SplitObject unknown” – in your case, any reference to any of the procedure/function of your protocol will raise this error.

It means, you not yet successfully integrated your protocol with the default ns2.