I'd added a bolt, washer, spring washer, nut combination to an assembly. The bolt was mated concentric with a hole (using cylindrical surfaces), and the other fasteners were mated concentric to the bolt (plus some face to face coincident mates to position them axially).
I then realised that the bolt was not concentric with the seed hole of a feature pattern - I'd accidentally made it coincident with one of the patterned holes. So I edited the concentric mate to reposition the bolt.......and this gave a load of mate errors.
SW seemed to think that the washers and nut ought still to be concentric with the original hole, even though there was no mate giving this relationship - if I tried moving the components, they spun on the axis of the original hole.
I've ended up having to delete the existing concentric mates between washers/nut and the bolt and then recreate the exact same mates in order for it to solve. WHY?????
Regards, John Harland SW2004sp5