In tlclient_exception.cc we can find the error codes PROTO_ERR_REQ_SESSION_FAILED and PROTO_ERR_TERMSERVER_ERROR. These are not used in the current server implementation, and we're unsure if they've ever been used. They are a bit redundant since we have PROTO_ERR_NO_TERMSERVER (which is used), and the translations (at least the Swedish) for them are also wrong. We should have a look if these actually have a purpose and delete them if not.
