The title may be a little cryptic, so allow me to explain. I've got a building that can store units in the same way as a transport. When I have one unit constructing it, I right click to order other units to repair it (and yes, they do have a repair skill for that building). Instead of the units walking over to repair it, I just get an error for an invalid order. Presumably, the load is prioritizing over the repair. They can auto-repair it, and can be ordered explicitly to repair it. It's just the right click that isn't working.
