Why does Blender crash when I select Skin for my 3D model? When I try to add a Skin modifier to my 3D model, the program crashes. The program doesn't close when it crashes. What can I do to avoid this? The 3D model is 4 000 quads/ 8 000 tris. We've tried on both Windows and Mac on the same scene.

Blender version:
Version 2.73 (2.73, 2015-Jan-07, Blender Foundation)



Antonio Buch: Thank you very much! This was actually what I was looking for, unfortunately I don't have enough reputation to mark your answer as correct.
I think you might not know the purpose of the Skin Modifier. With it, any vertex is kind of a tubular node connected to the other ones. It's for making quick base model like the image below:



Applied to a complex model, would take several minutes to process it. And the results are not pretty good though. Here you can see a cube and a Suzzane with the Skin Modifier. Suzzane completely freezed the aplication for 2 minutes. 



The use of the Skin Modifier is covered in its wiki page. 

At this point, I think this is not what you want to accomplish. As you have animation and rigging tags in your question, I think you need the Armature Modifier for make your character rig. Armature Modifier is named Skin in 3ds Max, maybe that's why you made this mistake (if you did).

It looks that I haven't clarify that enough: in this case, you need to create an Armature (a rig in Blender) and use the Armature Modifier (like Skin in 3ds Max) in your character's mesh.