I checked and there is no updates or anything. and it only happens when the household consists of more than one sim and if the house is on a large lot
and it also happens when my sim goes to a resort..
I don't think I asked, have you tried playing the same lot in a different world?
I have one last suggestion. Install a couple of Twallan's mods. They are awesome and compatible with 1.55. His mods have been resolving issues for Simmers for a long time with much success. The Mods I suggest are pure scripting mods so they won't blow up you game. My suggestion is to Back up your game. Remove any other mods you have from your game file. Install Twallan's Master Controller. Go into your game and click on City Hall. Click on NRAAS Master Controller, All, Town, Reset. This will clean up objects and fixes routing problems that could be causing crashes.
Just as an FYI, I use: Overwatch which routinely resets and cleans broken items within the game
Master Controller - Does much more than resets - check it out!,
Debug Enabler - many options including Visa Points, Sim Settings, Aging
Saves - Automatic Saving set at what ever time interval you wish
Here is the Link to NRAAS Industries where Twallan lives:
http://nraas.wikispaces.com/. All Mods are identified on the left and there is also, like Carl's, a good forum which might be able help if you can not resolve here. There are full instructions and other information for all Mods and Game Play.
I hope this works for you. I really can't think of anything else. Where this is happening in a specific situation it would seem something in your current world is broken.
Another thing just came to mind. Check out MrsFlynn's thread for a factory reset here:
http://www.carls-sims-3-guide.com/forum/index.php/topic,16824.0/topicseen.html