Grass in Octane ERROR

[MaverikMS2001]

I´ve trie to render grass in Octane. So i found this on the net:
http://forums.ronenbekerman.com/forums/ ... rials.html

i took the Object an put it with PFlow on a Plane. In the Viewport everything looks good but in rendering view only a few of instances will appear. Same Scene rendered in Vray looks fine but with Octane it doesent work.
Tried all Versions beginning 2.13

Any Idea how i can handle this ?

System 2x Titan Black