PMVAL returns "No values available" for the first record of the day

Issue

• pmval command returns No values available for the first record of the day.

• Example:

  [root@r74 ~]# pmval -a /var/log/pcp/pmlogger/r74/20171018.00.10.index -t 1h -z network.interface.in.bytes|more
  Note: timezone set to local timezone of host "r74" from archive
  
  metric:    network.interface.in.bytes
  archive:   /var/log/pcp/pmlogger/r74/20171018.00.10.index
  host:      r74
  start:     Wed Oct 18 00:10:11 2017
  end:       Wed Oct 18 08:40:42 2017
  semantics: cumulative counter (converting to rate)
  units:     byte (converting to byte / sec)
  samples:   9
  interval:  3600.00 sec
  00:10:11.985  No values available
  
                   eth0                    lo    
  01:10:11.985  No values available
  02:10:11.985             148.6                   0.0