RH7 compiled topics won't display and throw an IE (syntax) script error

Pundits,

I am using RH 7 to create projects of about 600 topics. My OS is Windows XP Pro 2002, SP-3. My problem is that approximately 10% of the topics in my .chm file prompt an IE script error msg when I, or anyone else, tries to open them.

Here's the error msg:

When this window displays, user can click on either Yes or No and topic will display normally; the next time a user attempts to open this topic, same error displays, with same Yes/No click behavior.

When I look at the html for any of the "bad" topics (i.e., topics that won't display), there is always this one extra line of code, referring to the ehlpdhtm.js file in my project folder:

<script language="javascript" src="ehlpdhtm.js"></script>

This line is never in the html of the "good" topics.

Can anyone shed any light on what's causing this, and what I can do to remedy the situation?

Thanks in advance.

Dennis