Try again without the 'Appendix\Appendix_F_Record_Retention.htm' topic. If it generates OK, the issue is with that topic. From there it will be proccess of trying to eliminate what is wrong with it.
Thank you. I looked here before posting the message but didn’t find what I was looking for. I looked again after receiving your email and found it. I tried all except putting the project on a more powerful machine; I don’t have access to one. None of them worked.
Next step then is to locate the topic. I seem to recall it is not the topic that is reported but the one after.
First make a couple of copies of your project and make sure the original is safe, zip a copy so that you cannot open it accidentally.
In one copy, delete from the layout the topics around the one reported.
If that fails to locate the problem, delete half the topics.
If that fails goes to another copy and delete the half you left in before.
Post back when you have tried that.
See www.grainge.org for RoboHelp and Authoring tips
It appears the 19 topics I added is the issue. I deleted them from the TOC/Chapter layout and the project published without the warning.