I’ve just spent hours on the phone with Adobe tech support! As tech support sessions go it was good–the support person did not make me redo all the things I’d done before to try to find out why documents indexed in CC 2015 will not export or save as .idml files for backward compatibility with CS6.

The solution to trying to recover the documents that I’ve indexed in CC 2015 is to move the pages to a new document (I know only what the tech support person says), and then save as .idml. I’m hoping that tech support managed to salvaged some of the work I’ve done.

I’m incredibly frustrated that I’m told this is a know issue, but there’s no way to find out about it until you’ve spend time with tech support.