Q1: Why do my Sims immediately jump away from the yoga mat when an animation starts?
This behavior is called a "jump bug" or engine reset. It happens when the game tries to execute an animation that references missing, misaligned, or deprecated routing bones. The engine aborts the sequence instantly to prevent the game client from freezing, resetting your Sims to a neutral stance nearby.
Q2: Is my save file permanently corrupted if I received multiple lastException errors?
No. In the vast majority of cases involving animation packs, lastException.txt errors are non-destructive runtime logs. They simply document that an interaction script failed to resolve in memory. Once you update the offending animation pack and clear your localthumbcache.package file, your save file will run normally.
Q3: Can I fix broken yoga animations using batch fixes in Sims 4 Studio?
No. While Sims 4 Studio batch fixes work wonders for catalog items, CAS clothing, and simple object slots, they cannot rewrite complex animation bone trajectories or fix external Python scripts. You must wait for the original animators to re-export the files or download verified compatibility patches directly from the creator.
