I've been trying to make a damaging hitbox, however, I keep getting the error "attempt to perform arithmetic (sub) on Instance and Vector 3." I set the region up like this

Rep.Events.Combat.OnServerEvent:Connect(function(Player, V1)
	local Region = Region3.new(V1-Vector3.new(3.2,2.1,3.5),V1+Vector3.new(3.2,2.1,5))
	local RTable = workspace:FindPartsInRegion3(Region, nil, 30)
	for i,v in pairs(RTable) do
Anonymous

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Don't use region3's to make hitboxes. Here's a module for it instead: https://devforum.roblox.com/t/raycast-hitbox-update-3-3-for-all-your-melee-needs/374482

Anonymous#