There is an error, but your output is fine right? I have no idea what that BIB thing does, so I can't be much help with that.
Can you provide this information to Adobe using the bug form: Adobe - Feature Request/Bug Report Form They can then pick it up and hopefully provide a solution.
I submitted a bug. I do believe the outputs compile properly.
I did a bit more testing on this. I tried a compile from the command prompt on the sample Salesbuilder.xpj project that ships with RoboHelp 10. I get the same results.
This could be machine-specific. Could you or someone here try to build Salesbuilder from the command prompt using rhcl just to see if you get the same result?
Below are the commands in an elevated command prompt ([username] must be replaced with your specific user ID).
cd "C:\Program Files (x86)\Adobe\Adobe RoboHelp 10\RoboHTML"
rhcl "C:\Users\[username]\Documents\My RoboHelp Projects\Adobe RoboHelp 10\Samples\Salesbuilder\SalesbuilderProject\Salesbuilder.xpj" -l "Microsoft_HTML_Help"
Just tested the RHCL on several output types and it worked fine on my end. (Though streaming the cmd output to a file seems limited somehow.) But no errors at all.
I am guessing this is machine-specific then.
Adobe was able to recreate this issue on their end, and a bug has been created for it.