Cannot create chm output

This is the output view showing the warning and fatal error:

Warning: The size of stop file has to be limited in 512 bytes.

C:\Documents and Settings\serboji\My Documents\BAMS\Help\BAMS UAS Help\BAMS UAS UPC Help\!SSL!\Microsoft_HTML_Help\!chm_tmp_folder_0\BAMS_UAS_UPC_Help.hhp
Microsoft HTML Help Compiler 4.74.8702

Compiling c:\Documents and Settings\serboji\My Documents\BAMS\Help\BAMS UAS Help\BAMS UAS UPC Help\!SSL!\Microsoft_HTML_Help\BAMS_UAS_UPC_Help.chm

BAMS_UAS_UPC_Help.hhc
BAMS_UAS_UPC_Help.hhk
Help Intro.htm
Overview.htm
Airfield_Editor_Status_Bar.htm
Managing_UAS_Airfields.htm
Airfield_Editor_Window.htm
Airfield_Overlay_toolbar.htm
Airfield_Editor_Toolbar.htm
System Administration Intro.htm
UAS_Airfield_Overlay.htm
Airfield_Editor.htm
Airfield_Editor_Menus.htm
UAS_Airfield_Preferences_and_Properties.htm

Fatal Error: Unexpected error from Microsoft HTML compiler.
Finished compiling HTMLHELP in 2 sec(s)

Compilation complete.

I am using TCS2 with linked Framemaker files. I have markers in Framemaker to generate topics (as opposed to RH pagination). I cannot attempt to compile againg without going to Project Settings reseting the Stop List to default then exiting and reopening Robohelp only to receive the same error.

Next, I tried reseting the Stope List, then deleting all htm files from Robohelp starting with UAS_Airfield_Preferences_and_Properties and all other htm topics derived from the same Frame file. I selected generate file on next update. I exited RH and reopened, this time my output file looks like this:

Warning: The size of stop file has to be limited in 512 bytes.

C:\Documents and Settings\serboji\My Documents\BAMS\Help\BAMS UAS Help\BAMS UAS UPC Help\!SSL!\Microsoft_HTML_Help\!chm_tmp_folder_0\BAMS_UAS_UPC_Help.hhp
Microsoft HTML Help Compiler 4.74.8702

Compiling c:\Documents and Settings\serboji\My Documents\BAMS\Help\BAMS UAS Help\BAMS UAS UPC Help\!SSL!\Microsoft_HTML_Help\BAMS_UAS_UPC_Help.chm

BAMS_UAS_UPC_Help.hhc
BAMS_UAS_UPC_Help.hhk
Overview.htm
Help Intro.htm
Airfield_Editor_Toolbar.htm
Managing_UAS_Airfields.htm
Airfield_Editor_Status_Bar.htm
Airfield_Editor_Window.htm
System Administration Intro.htm
UAS_Airfield_Overlay.htm
Airfield_Editor.htm
Airfield_Editor_Menus.htm
Airfield_Overlay_toolbar.htm
UAS_Airfield_Preferences_Properties_Editor_Tabs.htmc
HHC5003: Error:
Compilation failed while compiling BAMS_UAS_Help\System_Administration\UAS Airfield Preferences and Properties\UAS_Airfield_Preferences_Properties_Editor_Tabs.htmc.

UAS_Airfield_Preferences_Properties_Editor.htm
UAS_Airfield_Preferences_and_Properties.htm

Fatal Error: Unexpected error from Microsoft HTML compiler.
Finished compiling HTMLHELP in 2 sec(s)

Compilation complete.

Note the text I highlighted red, the file extension of the file with the compilation fail is htmc. However, in RH it displays as htm. Is this a clue to the fatal error? Has anyone seen this? Any suggestions on how to get my project to produce a chm again?

regards,

Nelle