i went to sell armor at modoc.
i was over weight and close to the max, but i could still walk.
i unloaded to the transfer screen to match the caps at the store.
i put all the caps to the store transfer screen and hit offer.
and got the error.
the armor was back in my inventory and caps back in the store inventory.
i went back to my tent and unloaded a bunch, went back and completed the sale.
my guess is the weight of the stuff i was selling was not taken off my carry weight and the weight of the caps put me over.
not a big deal.
just a heads up.
sorry if its already been reported.