So i modified my teen sim named "Michael" to have bad relationships with his parents. But he keeps running away! I kept controlling him to avoid doing so, when he ran away for the last time, and when i reported him missing, his name displays as $NameLocal:0 and when i do click on his name an error occurs saying "No stack object present when required". How do i fix this, and how do i bring Michael back?

Try to teleport the person into the world and cancel his interaction with the missing sim object. You can use Charles Object Editor. Select Person, Teleport Near the Editor, Notify Out of Interaction, (if didn't notify) Crash Object.

I think they normally return when the family moves out of the house. But then you lose the furniture and stuff, so that is nor very useful.

Then give him good relationships with someone using Insimenator floating heart to prevent him from running away again.

Can you post the error log?

uild: 1.17.0.66
at Oct 11 2008,15:12:07

Object id: 429
name: N001_User00679 - Susan
Stack size: 12
Error: No stack object present when required.
Iterations: 9
Frame 11:
Stack Object id: 0
Node: 17
Tree: id 4102 name 'Emergency - Report Sim Missing' version -32752
from PhoneCall_Emergency_MissingSim
Prim state: 0
Params: 34 Locals: 0 351 0 0
Frame 10:
Stack Object id: 351
Stack Object name: Phone Call - Emergency - Missing Sim
Node: 0
Tree: id 4098 name 'CT - Handle Call' version -32752
from PhoneCall_Emergency_MissingSim
Prim state: 0
Params: 3 34 Locals:
Frame 9:
Stack Object id: 351
Stack Object name: Phone Call - Emergency - Missing Sim
Node: 6
Tree: id 8279 name 'Calls - Handle Call (Sub-Type Known)' version -32754
from PhoneCallGlobals
Prim state: 1
Params: 144 3 34 348 Locals: 351
Frame 8:
Stack Object id: 345
Stack Object name: Phone Call - Emergency
Node: 4
Tree: id 4098 name 'CT - Handle Call' version -32742
from PhoneCall_EmergencyManager
Prim state: 0
Params: 3 34 348 Locals:
Frame 7:
Stack Object id: 345
Stack Object name: Phone Call - Emergency
Node: 3
Tree: id 8270 name 'Call - Handle Call' version -32756
from PhoneGlobals
Prim state: 1
Params: 144 3 34 348 Locals: 0 0
Frame 6:
Stack Object id: 348
Stack Object name: Phone - Base - Wall
Node: 10
Tree: id 8271 name 'Phone - Call' version -32755
from PhoneGlobals
Prim state: 0
Params: 348 144 3 34 Locals: 0
Frame 5:
Stack Object id: 348
Stack Object name: Phone - Base - Wall
Node: 32
Tree: id 8240 name 'Interaction - Call' version -32735
from PhoneGlobals
Prim state: 0
Params: 144 3 34 0 Locals: 1 348
Frame 4:
Stack Object id: 429
Stack Object name: N001_User00679 - Susan
Node: 5
Tree: id 281 name 'Wait For Notify' version 8
from global
Prim state: 1
Params: 0 1 Locals:
Frame 3:
Stack Object id: 429
Stack Object name: N001_User00679 - Susan
Node: 1
Tree: id 8282 name 'Function - Main - Check Queue' version 50
from PersonGlobals
Prim state: 0
Params: Locals: 295
Frame 2:
Stack Object id: 429
Stack Object name: N001_User00679 - Susan
Node: 2
Tree: id 8283 name 'Function - Main - Loop' version 96
from PersonGlobals
Prim state: 0
Params: 5 20 1 Locals: 0
Frame 1:
Stack Object id: 429
Stack Object name: N001_User00679 - Susan
Node: 6
Tree: id 8193 name 'Function - Main' version 118
from PersonGlobals
Prim state: 0
Params: Locals: 5 20 0
Frame 0:
Stack Object id: 429
Stack Object name: N001_User00679 - Susan
Node: 1
Tree: id 4096 name 'Function - Main' version 2
from TemplatePerson
Prim state: 0
Params: Locals:

I decided to skip the rest otherwise my text would be too lengthy

It looks like the object that tracks the missing sim somehow got its attribute that is supposed to reference that sim's ID set to 0. Possibly it got reset somehow in between the sim running away and you making the phone call.