[ccacp@el2310 cgi-bin]$ perl monkey.pl
Status: 500
Content-type: text/html

<h1>Software error:</h1>
<pre>Global symbol &quot;%hash&quot; requires explicit package name at monkey.pl line 9.
Global symbol &quot;$ref&quot; requires explicit package name at monkey.pl line 10.
Execution of monkey.pl aborted due to compilation errors.
</pre>
<p>
For help, please send mail to this site's webmaster, giving this error message
and the time and date of the error.

</p>
[Fri Mar 18 17:41:22 2016] monkey.pl: Global symbol "%hash" requires explicit package name at monkey.pl line 9.
[Fri Mar 18 17:41:22 2016] monkey.pl: Global symbol "$ref" requires explicit package name at monkey.pl line 10.
[Fri Mar 18 17:41:22 2016] monkey.pl: Execution of monkey.pl aborted due to compilation errors.