gs-extract-mesh returns empty mesh

[AlexanderVoldby]

Hi, thanks for the nice project.

I have been trying to extract a mesh from a pretrained model.

I run gs-extract-mesh and get an output where both rendered images and masks look fine

The outputted fused_mesh.ply however, is an 1 KB file that only contains headers and no vertices, e..g when I open it in visual studio code this is the only content
ply
format binary_little_endian 1.0
comment https://github.com/mikedh/trimesh
element vertex 0
property float x
property float y
property float z
element face 0
property list uchar int vertex_indices
end_header

has anyone experienced something similar?