[Topology] Dynamically add and remove element exceptions from empty mesh

[epernod]

Discussed in https://github.com/sofa-framework/sofa/discussions/3092

^{Originally posted by monkeygame July 1, 2022} Hello everyone! I'm learning about dynamically removing and adding tetrahedral elements examples\Components\topology\TopologicalModifiers I think I added four tetrahedrons, and then I deleted the first tetrahedron in the next step. An error occurs when I try to delete a group of tetrahedrons after adding a group of tetrahedrons. input:

T= 0.2
  ADD= Tetrahedra 4
0 1 9 3 1 10 9 13 13 1 10 11 1 2 11 5
T= 0.4
  REMOVE= 1
0 

error info: in vector<class sofa::type::Vec<3,double>> 25b825b0 size 25 : invalid index 25

Does anyone know why?