Builds an error response.

        @param request: The AMF request
        @type request: L{Request<pyamf.remoting.Request>}
        @return: The AMF response
        @rtype: L{Response<pyamf.remoting.Response>}

def buildErrorResponse(self, request, error=None):
        """
        Builds an error response.

        @param request: The AMF request
        @type request: L{Request<pyamf.remoting.Request>}
        @return: The AMF response
        @rtype: L{Response<pyamf.remoting.Response>}
        """
        if error is not None:
            cls, e, tb = error
        else:
            cls, e, tb = sys.exc_info()

        return generate_error(request, cls, e, tb, self.gateway.debug)