Index entries missing in .chm but are present in the printed version

Question

This is strange.
I have a number of index entries as follows:
troubleshooting/file problems
troubleshooting/login problems
troubleshooting/printer problems
These appear in the .docx (Word) version, which is what I've been using for the review cycle. Today, though, I had the .chm open and I noticed that the entire group of troubleshooting\ entries aren't in the .chm!
I recompiled the HTML Help, just in case I was looking at an old version and no, they're not there.
I searched for them in the Index tab, thinking maybe they were somehow out of order, but they're truly not there.
Any idea what could be causing this?  I'm using RoboHelp 9.

Answer 1

I don't know how to apply conditional build tags against an index, so I didn't do that -- at least not deliberately
I looked at the HTML, the Advanced tab in Topic properties, and the TOC page properties. I don't see anything there that looks like a Condition setting. I looked at the HTML externally (that is, went to Windows Explorer and double-clicked the file and then looked at the HTML source). Couldn't see anything. I launched the .chm file and then looked at the HTML for that topic. Still couldn't see anything.
I opened the .hhk file and I can see the entries for troubleshooting, I believe. Here is what I see:
<item name="troubleshooting">
        <item name="file problems">
            <section name="Release Information" link="Release_Information.htm">
            </section>
        </item>
        <item name="printer problems">
            <section name="Printing Problems" link="Printing_Problems.htm">
            </section>
        </item>
        <item name="checkerboard">
            <section name="Checkerboard Pattern in Window" link="Checkerboard_Pattern_in_Window.htm">
            </section>
        </item>
        <item name="screen display">
            <section name="Checkerboard Pattern in Window" link="Checkerboard_Pattern_in_Window.htm">
            </section>
        </item>
        <item name="login problems">
            <section name="Login Problems" link="Login_Problems.htm">
            </section>
        </item>
        <item name="misc problems">
            <section name="Other Problems" link="Other_Problems.htm">
            </section>
        </item>
        <item name="Reporting Services Reports">
            <section name="Reporting Services Reports Problems" link="Reporting_Services_Reports_Problems.htm">
            </section>
        </item>
        <item name="sorting problems">
            <section name="Sorting Incorrectly" link="Sorting_Incorrectly.htm">
            </section>
        </item>
    </item>