OnePoundFortyNine

Thanks for replying. The Blender exporter indicates "2013 binary" andI I've had no problems to date. Perhaps the chap who wrote the code as part of a Google "Summer of code"could comment? It appears to relate to "weight clusters". As it is an assert, I assume it's a scenario that has been considered?​

Hi I've exported an FBX binary file from Blender 2.74, which contains animation, mesh and material data. This file can then be successfully imported using the Blender FBX importer. When I run my rendering engine with Assimp 3.1.1 I receive the following assertion failure: workspace/assimp-3.1.1/code/FBXDocument.h:791: const unsigned int* Assimp::FBX::MeshGeometry::ToOutputVertexIndex(unsigned int, unsigned int&) const: Assertion `count != 0' failed. This is either an issue with the Blender FBX exporter...