(Corona + Forest Pack) geometry disappears just before the end of rendering

[sona]

Hi,
I have an issue with rendering in Corona while using Forest Pack.
The geometry disappears just before the end of rendering. While during the rendering the greenery was still visible.
Example in attachment.
Pls any advice?

Using:
3ds Max 2019
Corona Renderer 3 (Hotfix 1)
Forest Pack 6.1.5

[TomG]

Using DR or Backburner? Looks like the render nodes didn't receive the Forest Pack geometry (so the renders from the nodes don't have it, and they blend a result without it into the result from the master that had it, resulting in a 'transparent' look). Is FP installed on the render nodes?

[sona]

Not sure if DR or Backburner. For distributed rendering I installed the Autodesk Backburner and Corona DrServer on other nodes (PCs). But I don't have Forest Pack on them. So later today I will try to install it and will see.
Thx for the suggestion.