You should indicate which line is #47 in your program. There are a number of eval expressions on different lines. Can you redesign to do what you want without eval? It is a tricky function which is often a source of errors and security breaches.

There is one point where errors look likely. On line 8 we see a hash value eval'ed which has the same name as a scalar argument of the sub. If $temp_vars is a hashref, you should get a value from it with $temp_vars->{$1}. If you don't have a global %temp_vars (which from the name seems likely), then $temp_vars{$1} will generate an empty one for you, and feed undef to eval, producing the error you see.

This code appears to parse some sort of tagged text. Is it XML fragments? One of the XML parsers may be more suitable than these regex substitutions.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.