what is the meaning of this exception and how to prevent it?
java.lang.UnsupportedOperationException: The geometry Flame (ParticleEmitter) buffer TexCoord has different number of components than the rest of the meshes (this: 4, expected: 2)
at jme3tools.optimize.GeometryBatchFactory.mergeGeometries(GeometryBatchFactory.java:141)
at logic.translation.navmesh.NavMeshState.createNavMesh(NavMeshState.java:141)
at logic.translation.navmesh.NavMeshState.<init>(NavMeshState.java:50)