My active household has 9 sims plus 3 plumbots and each of them got one Bright Sprite Holo Disc (12 totally).
Every couple of days, when they started to interact with the sprites and one of the sims or plumbots will get the script error as below:
System.IndexOutOfRangeException: Array index is out of range.
#0: 0x0003e ldelem.ref in Sims3.Gameplay.Objects.HobbiesSkills.HoloDisc+CheckMood:OnShowBalloon
This is quite annoying because the sim or plumbot is reset immediately. I have tried to reset my sims, reset the Holo Discs, reset everything in town and buy a new Holo Disc but no luck.
Is this caused by over 8 sims household or too many Holo Discs in the active household?
Any idea to solve this? Thanks in advance.
P.S. I'm sorry that my living region is blocked by the site of NRaas. I can only ask for help here. Thanks again.

You are right here about having too many members in one household. When you bypass this limit (8 max), the game starts to glitch during specific animations. Best thing you can do is to reduce family members is to move some of them in the neighboring empty house equaly (6 members in the first house and 6 members in the other), or 8 in the first and 4 in the second.

Reducing the number of Holo disks and stop their autonomous usage and purchase with Nraas Retuner might be temporary solution, but this can't guarantee that the game won't stop glitching while having too many household members.