RoboHelp crashes when deleting a linked FrameMaker book

Hello all,

I'm working on RoboHelp 2015 on Windows 7 and I'm getting RoboHelp crashes when I attempt to delete a particular FrameMaker book from the RoboHelp Project in the Project Manager. The FrameMaker book has about 17 files (standard Cover, TOC, chapter files, glossary, and index). I'm able to delete other similar books, but when I get to this one, RH crashes -- every time. The error message is, "Adobe RoboHelp 2015 has stopped working." The only recourse is to close the window.

The RH project is just a couple months old (created on RH 2015). But the FrameMaker files have been around for years, and converted to FM 2015 from at least FM 9 if not earlier, and they have several conditional text settings.

Any ideas how to fix this?

I checked the log files, but they don't mean much to me:

<ProblemSignatures>

  <EventType>APPCRASH</EventType>

  <Parameter0>RoboHTML.exe</Parameter0>

  <Parameter1>12.0.0.306</Parameter1>

  <Parameter2>5550e7cd</Parameter2>

  <Parameter3>RoboHTML.exe</Parameter3>

  <Parameter4>12.0.0.306</Parameter4>

  <Parameter5>5550e7cd</Parameter5>

  <Parameter6>c0000005</Parameter6>

  <Parameter7>0001975e</Parameter7>

  </ProblemSignatures>

Any help would be much appreciated!

Kate