Karma in SOP with instanced objects

[Infinite Rave]

Hi,

I have an issue with Karma and instances. I use Karma as a render node in the SOP context in a ROP node (so not in Solaris). The instances I set are showing in the viewport, working properly in Mantra, but not in Karma.
Here is a simple example:



This is what I get in Mantra:

But unfortunately Karma shows no instances:

Is there a special way instances can be rendered out with Karma?

I hope someone can explain wht I missed.

Thank you in advance. 

PS: sample file is attached. 

karma_instance_issue.hipnc