我有以下代码：
99 if($host =~ /R3|R6/) {
100 #task 1.2 3 points
101 try {
102 my $ns = "http://xml.juniper.net/junos/$ver/junos-interface";
103 my $out = $jnx->get_interface_information(interface_name => "ae10")->toString();
104 my @ex_path = (["up","//x:oper-status"],["up","//x:admin-status"]);
105 my $ret = Check->checkt($ns,$out,@ex_path);
106 for(@{$ret}) {
107 my $feed;
108 $tasks[2]->[3]=$tasks[2]->[2] if $_->[0] == 0;
109 $feed = $_->[2] if $_->[2];
110 $feed = "Not Set" unless $_->[2];
111 push @{$tasks[2]},"$host AE10 is currently $feed" if $_->[0] == 0;
112 }
113 my $datax = XML::LibXML::XPathContext->new(XML::LibXML->load_xml(string => $out));
114 $datax->registerNs("x",$ns);
115 my $minlinks = $datax->findvalue("//x:minimum-links-in-aggregate");
116 if($minlinks < 2) {$tasks[2]->[3]=$tasks[2]->[2]; push @{$tasks[2]},"$host does not currently have the minimum links set";}
117 } catch {
118 $tasks[2]->[3]=$tasks[2]->[2];
119 push @{$tasks[2]},"$host AE10 is currently not available";
120 };
121 }
我正在尝试捕获第 103 行产生的以下错误：
Can't call method "toString" on an undefined value at file.pm line 103, <> line 2.
并跳过 try 块的其余部分，执行 catch 块并保持脚本继续运行，但即使在 try/catch 添加到脚本之后，它也不会这样做。
有谁知道我该怎么做？