Cannot save a new element link for one GRE

I am creating some new elements related to an accrual plan and I was able to create and save element links for three out of four GREs that will use this accrual plan. When I try to save the element link for the final GRE, it does not save and the cursor just spins until I force the window to close. It seems likely that this is related to something with that particular GRE, but we have other elements linked to that company and have never had this problem before. Any ideas?