Gotcha. I’m on 5.5 and the Spawn Spline Mesh node doesn’t provide any output so I can’t test that out but I can see your problem. Depending on what you need to scatter there is probably a way to do it, just not directly sampling the mesh. Volume Sampler against a proxy volume mesh distributed along the spline or Surface Sampler might work if you can generate an appropriate surface. You can also resort to BP/C++ node and do raycasts if you need that level of control.