Error running javac.exe compiler

EDIT:
Fixed..
See this link for help:
http://www.robertsindall.co.uk/blog/setting-java-home-variable-in-windows/


I followed this tutorial
https://confluence.jetbrains.com/display/MPSD32/Custom+Persistence+Cookbook
added the right paths
but I'm getting the mentioned error in the title?

What's the problem?

Thanks for any help!

Kind regards
msch95