I had this after the new patch and installing the new pack. I would tell my sims to do something and they'd just stand there. I tried playing with a previous family I'd created, and it worked fine. The only difference I could see was that the old family didn't have pets, whereas my new family had a cat and dog. So i removed the cat, and it worked for about 5 minutes when the same issue started occurring. So i removed the dog from the household too and my game has worked fine since.
I removed the pets with the edit in CAS cheat - ctrl, shift, C - type in 'testingcheats true' and press enter, and then type in 'cas.fulleditmode' enter. Hold shift and click on any household member and then click on edit in CAS. It will open up CAS and then I just deleted the pets from the family.
I haven't tried re-adding them yet.
