Missing UV-information after export to G3DJ

[schuettec]

Hi there,
I exported a simple model from blender to FBX. The model contains a UV-mapping. I reimported the FBX file into a clean blender project to check if the UV config is exported correctly - and it is:

The screenshot shows, that the uv information is correctly exported in the FBX file and Blender renders the model correctly.

However, if I use FBX-Conv to convert to G3DJ with
../fbx-conv -f -v -o G3dj ./uvmap.fbx ./uvmap.g3dj
the uvMapping attribute is empty:

	"materials": [
		{"id": "Material", 
			"ambient": [ 0.050876,  0.050876,  0.050876], 
			"diffuse": [ 0.800371,  0.029121,  0.000000], 
			"emissive": [ 0.000000,  0.000000,  0.000000], 
			"opacity":  1.000000, 
			"specular": [ 0.800371,  0.029121,  0.000000], 
			"shininess":  25.000000, 
			"textures": [
				{"id": "base_color_texture", 
					"filename": "UVImage.png", 
					"type": "DIFFUSE"}
			]}
	], 
	"nodes": [
		{"id": "Cube", 
			"rotation": [-0.707107,  0.000000,  0.000000,  0.707107], 
			"parts": [
				{"meshpartid": "Cube_part1", 
					"materialid": "Material", 
					"uvMapping": [[]]}
			]}
	], 

Is this a know limitation, a bug or am I missing something?

Thank you!

Btw, the output of fbx-conv is the following:

INFO:     FBX to G3Dx converter, version 0.01.0000 x64 , FBXSDK 2019.00
STATUS:   Loading source file
STATUS:   FBX file version 7 4 0
PROGRESS: Import FBX 100.00%                                                             
STATUS:   [Cube] Triangulating FbxMesh geometry
VERBOSE:  [Cube] polygons: 12 (36 indices), control points: 8
STATUS:   Converting source file
STATUS:   Closing source file
VERBOSE:  Listing model information:
VERBOSE:  ID        : 
VERBOSE:  Version   : Hi=0, Lo=1
VERBOSE:  Meshes    : 1 (24 vertices, 1 parts, 36 indices)
VERBOSE:  Nodes     : 1 root, 1 total, 1 parts
VERBOSE:  Materials : 1 (1 textures)
STATUS:   Exporting to G3DJ file: ./uvmap.g3dj
STATUS:   Closing exported file