error_remote_callback_add

	status.i4.v = error_remote_callback_add(error_handler.f.v,
						handler_data.g.v)

	This routine registers a functiom to be called whenever a remote
	error message is received by the calling program.

	error_handler	handler function which is called when a remote
			message is received to be called as follows:
			error_handler(handler_data.g.v, error_data.s.r)
			("error_data" is a structure of type REMOTE_ERROR_DATA)
	handler_data	pointer to user-supplied data to be passed to
			the error handler function (default is NULL)

	This function returns ACNET status values as follows:

	OK			success
	CLIB_DUPREQ		requested handler is already registered

	This function requires the following include files:

	cnsparam_h, acnet_h, clib_h, acnet_errors_h

	Related functions:

	error_remote_callback_remove, error_last_remote, error_printf_remote_c,
	error_mprintf_remote_c

	C/C++ usage:

	int	status;
	void	error_handler(void *handler_data,
			      REMOTE_ERROR_DATA *error_data);
	void	*handler_data = (void *) NULL;

	status = error_remote_callback_add(error_handler,handler_data);