System error

error:  Can't call method "prepare" on an undefined value at /Programs/MathSciNet/Current/mason/msc/convList.html line 108, <_GEN_1> line 7393.
context: 
... 
104:  "FROM classes ".
105:  "WHERE lvl=1 AND mr_beg_yr=2000;";
106: 
107:  my $results;
108:  my $convQuery = $dbh->prepare($sql2000);
109:  if ($convQuery->execute()) {
110:  while (defined(my $hash = $convQuery->fetchrow_hashref())) {
111:  push (@results, $hash);
112:  }
... 
code stack:  /Programs/MathSciNet/Current/mason/msc/convList.html:108
/System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm:951
/dsk2/mason/var/mason/msc/obj/4024685923/convList.html.obj:17
/Programs/MathSciNet/Current/mason/msc/tabHandler:26
/System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm:951
/dsk2/mason/var/mason/msc/obj/4024685923/tabHandler.obj:15
/Programs/MathSciNet/Current/mason/msc/tabHandler:19
/System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm:951
/dsk2/mason/var/mason/msc/obj/4024685923/tabHandler.obj:53
/Programs/MathSciNet/Current/mason/msc/autohandler:62
/System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm:951
/dsk2/mason/var/mason/msc/obj/4024685923/autohandler.obj:20
/Programs/MathSciNet/Current/mason/msc/syshandler:166
raw error






























Can't call method "prepare" on an undefined value at /Programs/MathSciNet/Current/mason/msc/convList.html line 108, <_GEN_1> line 7393.


Trace begun at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Exceptions.pm line 129
HTML::Mason::Exceptions::rethrow_exception('Can\'t call method "prepare" on an undefined value at /Programs/MathSciNet/Current/mason/msc/convList.html line 108, <_GEN_1> line 7393.^J') called at /Programs/MathSciNet/Current/mason/msc/convList.html line 108
HTML::Mason::Commands::__ANON__('link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 160
HTML::Mason::Component::run_dynamic_sub('HTML::Mason::Component::FileBased=HASH(0xb66dc80)', 'main', 'link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 951
HTML::Mason::Request::call_dynamic('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)', 'main', 'link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /dsk2/mason/var/mason/msc/obj/4024685923/convList.html.obj line 17
HTML::Mason::Commands::__ANON__('link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xb66dc80)', 'link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1305
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, 'link', 'conv.html', 'tab', 1, 'btn', '', 'text', 'MSC Conversion Table', 'file', 'convList.html', 't', '13Dxx') called at /Programs/MathSciNet/Current/mason/msc/tabHandler line 26
HTML::Mason::Commands::__ANON__('link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 160
HTML::Mason::Component::run_dynamic_sub('HTML::Mason::Component::FileBased=HASH(0xb295448)', 'subcomponent_doFolder', 'link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 951
HTML::Mason::Request::call_dynamic('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)', 'subcomponent_doFolder', 'link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /dsk2/mason/var/mason/msc/obj/4024685923/tabHandler.obj line 15
HTML::Mason::Commands::__ANON__('link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::Subcomponent=HASH(0xb2951b8)', 'link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1305
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, 'link', 'conv.html', 'text', 'MSC Conversion Table', 'file', 'convList.html', 'btn', '', 't', '13Dxx') called at /Programs/MathSciNet/Current/mason/msc/tabHandler line 19
HTML::Mason::Commands::__ANON__('btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 160
HTML::Mason::Component::run_dynamic_sub('HTML::Mason::Component::FileBased=HASH(0xb295448)', 'main', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 951
HTML::Mason::Request::call_dynamic('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)', 'main', 'btn', '', 't', '13Dxx') called at /dsk2/mason/var/mason/msc/obj/4024685923/tabHandler.obj line 53
HTML::Mason::Commands::__ANON__('btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xb295448)', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1305
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef, 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 958
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)') called at /Programs/MathSciNet/Current/mason/msc/autohandler line 62
HTML::Mason::Commands::__ANON__('btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 160
HTML::Mason::Component::run_dynamic_sub('HTML::Mason::Component::FileBased=HASH(0xb295518)', 'main', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 951
HTML::Mason::Request::call_dynamic('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)', 'main', 'btn', '', 't', '13Dxx') called at /dsk2/mason/var/mason/msc/obj/4024685923/autohandler.obj line 20
HTML::Mason::Commands::__ANON__('btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xb295518)', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1305
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef, 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 958
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)') called at /Programs/MathSciNet/Current/mason/msc/syshandler line 166
HTML::Mason::Commands::__ANON__('btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xb2a03c0)', 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1300
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef, 'btn', '', 't', '13Dxx') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 484
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 484
eval {...} at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/Request.pm line 436
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/ApacheHandler.pm line 168
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0xafd18d0)') called at /System/Links/Libraries/perl5/site_perl/5.12.1/HTML/Mason/ApacheHandler.pm line 825
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0xb1f0c40)', 'Apache2::RequestRec=SCALAR(0xb448a78)') called at (eval 1007) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0xb448a78)') called at -e line 0
eval {...} at -e line 0