Hello,
I am using XML::XPath to parse an xml file which I've put at the bottom of the post.

In the following code while trying to find the sum of all the elements in @totrain and print it,I keep getting the
following error. Any suggestions on how to remove this?

Code

sub RainSoFarMessage{

    my $ulimit = shift;         
    #print "\n$ulimit";

    my $xp = XML::XPath->new(filename 
    => 'weather_records.xml'); 

    my @totrain=();
    my $nodes;
    
    for ($month=1;$month<=$ulimit;$month++){
    
      #print "\n$month";
    
      my $pattern = "$month-";   
      #print "\n$pattern";       
                      
      $nodes = $xp->findnodes("//MonthlyWeatherRecord
      [contains(date,'$pattern')]"); 
                         
       foreach my $node($nodes->get_nodelist){
           push @totrain,$xp->findvalue(".//totalrainfall/ 
           \@number",$node);
      
        }
      
      } 
        
      #print "\n@totrain";
      my $total=0;
      #print "\n$total";
      
      foreach my $t(@totrain){
                      
       #print "\n$t";         
       
           $total=$total + $t;
           #print "\n$total";
       }
           return $total;     
 }
[download]

Main

my $monthrs = 2;
my $totalrs = RainSoFarMessage($monthrs);
#print "\n$totalrs";

my @RainSoFarMesg=();

push @RainSoFarMesg,$monthrs,$totalrs;
#print "\n@RainSoFarMesg";
[download]

Error

Operation `+': no method found,
    left argument has no overloaded magic,
    right argument in overloaded package XML::XPath::Literal at C:\..\
+..\xmlrecord_parse.pl line 480.

Tool completed with exit code 255
[download]

Line 480 is this:

$total=$total + $t;

Any help would be appreciated.
Thanks,
perl_seeker :)

weather_records.xml

- <AnnualWeatherRecord>
- <DailyWeatherRecord>
  <date>1-1-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="33.95" /> 
  <mindrybulb unit="degrees-centigrade" number="30.95" /> 
  <maxwetbulb unit="degrees-centigrade" number="33.53" /> 
  <minwetbulb unit="degrees-centigrade" number="30.53" /> 
  </temperature>
  <totalrainfall unit="mm" number="0.5" /> 
  </DailyWeatherRecord>
- <DailyWeatherRecord>
  <date>2-1-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="23.34" /> 
  <mindrybulb unit="degrees-centigrade" number="23.20" /> 
  <maxwetbulb unit="degrees-centigrade" number="23.14" /> 
  <minwetbulb unit="degrees-centigrade" number="20.14" /> 
  </temperature>
  <totalrainfall unit="mm" number="0" /> 
  </DailyWeatherRecord>
- <DailyWeatherRecord>
  <date>1-2-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="44.25" /> 
  <mindrybulb unit="degrees-centigrade" number="39.25" /> 
  <maxwetbulb unit="degrees-centigrade" number="33.53" /> 
  <minwetbulb unit="degrees-centigrade" number="30.53" /> 
  </temperature>
  <totalrainfall unit="mm" number="0.5" /> 
  </DailyWeatherRecord>
- <DailyWeatherRecord>
  <date>2-2-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="50.25" /> 
  <mindrybulb unit="degrees-centigrade" number="49.25" /> 
  <maxwetbulb unit="degrees-centigrade" number="23.14" /> 
  <minwetbulb unit="degrees-centigrade" number="20.14" /> 
  </temperature>
  <totalrainfall unit="mm" number="0" /> 
  </DailyWeatherRecord>
- <MonthlyWeatherRecord>
  <date>1-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="33.95" /> 
  <mindrybulb unit="degrees-centigrade" number="23.20" /> 
  <avgdrybulb unit="degrees-centigrade" number="33.95" /> 
  </temperature>
  <totalrainfall unit="mm" number="0.5" /> 
  </MonthlyWeatherRecord>
- <MonthlyWeatherRecord>
  <date>2-2004</date> 
- <temperature>
  <maxdrybulb unit="degrees-centigrade" number="50.25" /> 
  <mindrybulb unit="degrees-centigrade" number="39.25" /> 
  <avgdrybulb unit="degrees-centigrade" number="44.25" /> 
  </temperature>
  <totalrainfall unit="mm" number="0.5" /> 
  </MonthlyWeatherRecord>
  </AnnualWeatherRecord>
[download]