[rrd-users] Help Please

[John]

I am getting a error

Error in RRD::graph for /var/log/rrd/bmm_cable.rrd: unknown variable 'dpl'

when I run this script

what did i do wrong ?

sub updatebmmgraph {
   my $period    = $_[0];

 RRDs::graph ("$graphs/bmm-$period.png",
   "--start", "-1$period", "-aPNG", "-i", "-z",
   "--alt-y-grid", "-w 600", "-h 100", "-l 0", "-u 30", "-r",
     "--color", "SHADEA#EAE9EE",
   "--color", "SHADEB#EAE9EE",
   "--color", "BACK#EAE9EE",
   "-t $tr{'Power Level per'} $tr{$period}",
   "-v$tr{'dBmV'}",
   "DEF:dpl=/var/log/rrd/bmm_cable.rrd:dpl:AVERAGE",
   "DEF:upl=/var/log/rrd/bmm_cable.rrd:upl:AVERAGE",
   "LINE1:dpl#00FF00:$tr{'Downstream Power Level'}\\j",
   "LINE2:upl#00FF00:$tr{'Upstream Power Level'}\\j",
   "GPRINT:dpl:MAX:$tr{'maximal'} $tr{'in'}\\:%3.01f %sdBmV",
   "GPRINT:dpl:AVERAGE:$tr{'average'} $tr{'in'}\\:%3.01f %sdBmV",
   "GPRINT:dpl:LAST:$tr{'current'} $tr{'in'}\\:%3.01f %sdBmV\\j",
   "GPRINT:upl:MAX:$tr{'maximal'} $tr{'out'}\\:%3.01f %sdBmV",
   "GPRINT:upl:AVERAGE:$tr{'average'} $tr{'out'}\\:%3.01f %sdBmV",
   "GPRINT:upl:LAST:$tr{'current'} $tr{'out'}\\:%3.01f %sdBmV\\j");
     $ERROR = RRDs::error;
     print "Error in RRD::graph for $rrd: $ERROR\n" if $ERROR;
}

sub updatebmmdata {
 if (! -e "$rrd") {
   RRDs::create ("$rrd", "-s 300",
               "DS:dsn:GAUGE:600:-1:100",
               "DS:usn:GAUGE:600:-1:100",
               "DS:dpl:GAUGE:600:-100:100",
               "DS:upl:GAUGE:600:-1:200",
                   "DS:dfr:GAUGE:600:-1:U",
                   "DS:ufr:GAUGE:600:-1:U",
               "RRA:AVERAGE:0.5:1:576",
               "RRA:AVERAGE:0.5:6:672",
               "RRA:AVERAGE:0.5:24:732",
               "RRA:AVERAGE:0.5:144:1460");

               $ERROR = RRDs::error;
               print "Error in RRD::create for BMM: $ERROR\n" if $ERROR;
   }


###
### BMM graphs
###
updatebmmdata();
updatebmmgraph ("day");
updatebmmgraph ("week");
updatebmmgraph ("month");
updatebmmgraph ("year");

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