VRayRenderID showing black in EXR

V-Ray V-Ray for 3ds Max General
1

Hello,
I am trying to include a VrayRenderID element into an EXR output file. Unfortunately, the element is only showing up black without separate colors.
Is there a way to fix this?
Apart from Cryptomatte, I would like to use VrayRenderID.

Thank you!

2

Hi could you explain a bit further your workflow? How do you save your output and how do you view it afterwards?