combat magic antimations

I noticed that sometimes combat animations always work but the effects do not always work for while i just thought there was no effects unitll i casted a lighting bolt one time and there was animation for it effect for it same with fireball magic so sometimes it works and sometimes it dose not.

I wonder if any of this stuff corolates with the memory dumps, like if the files are getting stuck for sound and animatios in ram game thinks it running but cant connect them so then it trys to reload and reload and eventual you run out of ram and game crashes becuase it works at frist i noticed and then just stops working after while then couple hours go by and it crashes.