Tri state issues killing my multi-bit adder

[Toasterbot]

"Input pin x1 of&(9,21) connected to more than one output pin that are not tri state stable"
I get an error like this for each of the pins on the left-most gates in this full adder:

It worked fine independently with button inputs and LED outputs. This error only occurs when I use my full adder as part of a larger adder, such as this one:

[admin]

It probably telling the truth, you have connected two outputs to one input. If you share here your circuit it will be easier to help you.

[Toasterbot]

Here's the zip of the project. It has a bunch of other simple components, but only Adder and Main were involved in the issue here.

[admin]

Hi,
What you have is a connection between your inputs A and B on the leftmost adder.
In the future you can search for such incidences by selecting all connected wires Hold Shift key and click a wire and using menu Edit – select all different components.
Hope this help,
Eugene

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