Simulation error Division by zero

Symptom

On-screen or in the log file you will see an error like:

Simulation error: Division by zero

This will often crash the game.

Cause

We have not yet identified the cause, but it is likely caused by a mod or incompatiiblity between mods.

The error will sometimes include at TrafficManager.Custom.AI .... While TM:PE might be mentioned, it's not the cause of the error, it's just affected by the error.

Solution

None at present

We are currently investigating the following mods:

Enhanced District Services (very likely)
Real City (very likely)
Mod Tools (unlikely)
Extended Asset Editor (unlikely)
Stops and Stations
More Advanced District Snapping (unlikley)
More Advanced Info Views (unlikely)
Backward Compatibility: New Roads For Network Extension 2
Historical Districts
More Advanced Toolbar
Trailer Variation Loader
Enhanced Zoom
Control Building Level Up
Cargo Info Mod
Prop It Up
CSL Map View
Extended Control Panel
WG Citizen Edit (bad values in XML could cause issue)
WG Realistic Population and Consumption (bad values in XML could cause issue)
Ploppable RICO, or workshop definitions for it (bad values in XML could cause issue)
CSL More Graphs
Profitable Tourism
Employment Details
Favorite Cims
Better Bulldozer
Demand Master
Traffic Report Mod
Mayoral City Service Info
"DB WLS" font for Procedural Objects

If you have some of those, try disabling them, exit to desktop (to flush them from RAM), then reload your save to see if it works. If you find a mod that causes the problem, please let us know!