I am trying to parse XML files using the XML parser but it fails with the error when the Couldn't open /path to file.xml : No such file or directory at /usr/local/share/perl5/XML/Parser/PerlSAX.pm line 146.

The xml files does exist in the mentioned location.

This is how I am calling the my $parser = XML::Parser::PerlSAX->new( Handler => $RespHandler ); $parser->parse(Source => { SystemId => $ResponseXML });

I don't see any filename in the code fragment you posted. I guess it is hidden in $ResponseXML.

Anyway, try to print out the filename right before calling $parser->parse() to see if your idea of the filename and the filename actually used are the same. If you have no better idea, add

use Data::Dumper qw();
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to the top of your script and

print Data::Dumper->new([$ResponseXML],['ResponseXML'])->Useqq(1)->Dum
+p(),"\n";
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right before $parser->parse(). Running your script will give you debug output similar to this:

$ResponseXML = {
                 "Other" => [
                              "stuff",
                              "may also",
                              "appear"
                            ],
                 "filename" => " /opt/XML/otherfile.xml\n"
               };
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Note that in my example, I added some common errors: leading space, trailing newline, different directory, different filename.

Alexander