INTEGER . ATPNT(MAXTRK), ! Pointer to the same track in ! /ZATRA/ . CLUNB(MAXTRK), ! Cluster-number of most energetic ! shower of the track in /ZACLU/ ! (kept for backward compability. ! will be remoed) . CLUNBN(MAXTRK,MAXSHO), ! Cluster-number in /ZACLU/ . PARNB(MAXTRK) ! Parent-number in /ZAPRN/