I suspect that I have a corrupt design table. Can anyone verify?

I created this part and created the design table with it.

Now, I can't access the design table at all.

It is telling me that I have insufficient memory to access it.

I know that this isn't the reason because:

1) I have another part with a larger design table that I can access easily.

2) There is no memory spike when I try to access it.  Barely 1/3 of my memory is being utilized.

This was made in SW 2015 SP5 btw.

SolidworksParts And Features