It's possible that you encounter a crash of Caldera V11 under Debian 8.6 (Jessie) when you try to launch any document in the Documentation menu of the Help menu.
It will close the software immediately without any warning or error but under terminal you will have an error message "Exiting: internal error".
This happens because Acrobat Reader is not installed on the computer.
Install Adobe Acrobat reader from our Tools section, Adobe Reader
Articles in this section
Caldera V11, Debian 8.6, access documentation causes Caldera to crash
Updated