+ if (
+ /* removed because this does not agree with the definition
+ a heart beat can be unknown */
+ /* (rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt
+ > rrd.ds_def[i].par[DS_mrhb_cnt].u_cnt) || */
+ /* if the interval is larger thatn mrhb we get NAN */
+ (interval > rrd.ds_def[i].par[DS_mrhb_cnt].u_cnt) ||