So I recently inserted a 1/4-20 x 1" socket head cap screw in a model,...no problem. Then today I come back and try to put in a 1/4-20 x 3/8". It generates the configuration but I've got all kinds of red in my feature tree. I opened the part and it is somehow complaining about a mate reference geometry missing (??!).. See screenshot:

There seems to be no rhyme or reason to it, as I can envoke some of the other configurations (let's say 1/4-20 x 3.00") and it is fine:

Anybody see this ever? And know what is causing it? It is really frustrating because every single instance of one of these screws shows up red on the feature tree. Bah!