UE version 4.4.3 Constant Crashing?

Hi, I have recently been working in a blueprint when the engine crashed on me. Now whenever I try to go to the level I was on prior or the blueprint I was on at the time, the engine immediately crashes. Before the crash, I was making a blueprint that had a volume that was spawning random meshes and a volume that would destroy everything that falls in it after a delay.link text I have attached a document of the error log.