Try to parenting with automatic weight and it become very slow. More than 40 minutes, and cannot understood why. The mesh is not too dense (parenting similar meshes frequently during my work week) and usually take few seconds to a couple of minutes, now this is the second mesh give me a problem like this. The mesh was before parented to another armour, but I cancelled not only previous parenting (deleting armour modifier) but also cancelled all the vertex group.
Any tips about?