add: if (tmb.register_tmcb( TMCB_ON_NEGATIVE, on_missed, 0  ) <=0 ) return -1;
context: static int mod_init( void ){	load_tm_f	load_tm;	fprintf( stderr, "acc - initializing\n");	/* import the TM auto-loading function */	if ( !(load_tm=(load_tm_f)find_export("load_tm", NO_SCRIPT))) {		LOG(L_ERR, "ERROR: acc: mod_init: can't import load_tm\n");		return -1;	}	/* let the auto-loading function load all TM stuff */	if (load_tm( &tmb )==-1) return -1;	/* register callbacks */	if (tmb.register_tmcb( TMCB_REPLY, acc_onreply, 0 /* empty param */ ) <= 0) 		return -1;	if (tmb.register_tmcb( TMCB_E2EACK, acc_onack, 0 /* empty param */ ) <=0 )		return -1;	if (tmb.register_tmcb( TMCB_REQUEST_OUT, acc_onreq, 0 /* empty param */ ) <=0 )		return -1;	return 0;}