I recently installed a trial copy of FrameMaker 2017 on my computer. I opened a DITA 1.3 map from FrameMaker 2015 and tried saving it to PDF, I receive the message: There was an error opening this document. This file cannot be found.
I then created a very simple three topic map in DITA 1.3 and also DITA 1.2 and receive the same message.
I then tried to publish the maps to Responsive HTML5 and receive the message: Failed to publish. Check if JRE is installed. I have no idea what JRE is and how to find whether it is installed or not.