System error

error:  Can't call method "selectrow_hashref" on an undefined value at /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm line 140.
context: 
... 
136:  sub _fetch {
137:  my $self = shift;
138: 
139:  if (not $self->{SITE_ID} > 0) {
140:  my $row = $self->{DBH}->selectrow_hashref("select site_id, bulk_group from site where string = ?", undef, $self->{SITE_STRING});
141: 
142:  if (ref $row && $row->{site_id} > 0) {
143:  $self->{SITE_ID} = $row->{site_id};
144:  $self->{BULK_GROUP} = $row->{bulk_group};
... 
code stack:  /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm:140
/usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm:54
/usr/local/idx/apache2/htdocs.tucson/neighborhood-analyzer/dhandler:449
raw error






























Can't call method "selectrow_hashref" on an undefined value at /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm line 140.


Trace begun at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Exceptions.pm line 125
HTML::Mason::Exceptions::rethrow_exception('Can\'t call method "selectrow_hashref" on an undefined value at /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm line 140.^J') called at /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm line 140
IDX::Site::_fetch('IDX::Site=HASH(0x86c27e0)') called at /usr/local/lib/perl5/site_perl/5.28.3/IDX/Site.pm line 54
IDX::Site::new('IDX::Site', 'tucson') called at /usr/local/idx/apache2/htdocs.tucson/neighborhood-analyzer/dhandler line 449
HTML::Mason::Commands::__ANON__ at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x46ae338)') called at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Request.pm line 1300
eval {...} at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Request.pm line 1292
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Request.pm line 481
eval {...} at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Request.pm line 481
eval {...} at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/Request.pm line 433
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x85ac830)') called at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/ApacheHandler.pm line 168
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x85ac830)') called at /usr/local/lib/perl5/site_perl/5.28.3/HTML/Mason/ApacheHandler.pm line 825
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x84ac3d0)', 'Apache2::RequestRec=SCALAR(0x850f290)') called at (eval 26) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0x850f290)') called at -e line 0
eval {...} at -e line 0