memory leak?

I am getting an error if I leave my XCode simulator on. I am wondering if it is because its a memory leak.
0x1181efc9: addps %xmm5, %xmm6 the error given is Thread 1:EXC_??? (11) (code=0,subcode=0c0)

Does anyone have an idea of what this means? I believe the hex is most likely a memory address which is why i think its a memory leak