Hi Christof,
When installing DS 1.3 a message popped up that I needed JRE 6 or 7 and a download path (Oracle) was offered. I clicked on it and downloaded the newest version 8.
I still have the same problem as Kelly. I tried her solution, uninstalling and re-installing in a new path.
It didn't help.
The version command returns
No matter what I do, the following command always returned:
"set java_home" returns "Environment variable undefined"
I then tried downloading version 7. I installed it and it worked.
Does jre 8 not work with DS 1.3?