Grimrock

For my small mod I try to create some simple animated monsters using the Grimrock Model Toolkit. I import the obj file and then add the nodes for animations and give those the mesh as child node. I am not using 3dmax and this seems the only possible way for me. So far I use the default animations of the game and some modified ones. Everything is working fine so far, but I still get a warning from the editor: "Warning! can't find skeleton for monster 'monstername' " Can I ignore this or will this cause issues with the game?