Array Index Symptom 13

Verified: February 2020 - TM:PE 11.1.1

This is one cause of the Simulation error Array index is out of range error.

Symptom

You will see this error:

• Simulation error: Array index is out of range.

In the log file, you'll see one of the following below the error:

• at TransportLineAI.CheckNodePosition ...

Cause

This happens when a stop on a transport line is broken due to missing network assets (roads, rails, etc); the game can't chance the position because the road or track no longer exists.

Solution

If you haven't already done so, subscribe and enable Loading Screen Mod (LSM). In it's mod options, enable sharing/optimisation features.

The first thing we need to deal with is the missing networks. You have two choices - either try and revive them, or just get rid of them...

To revive missing networks

• In LSM mod options, enable the Asset Reporting options
• Load your city
• When it loads, exit game to desktop
• Look in the LSM reports and it will list the missing networks - resubscribe them

To remove missing networks

• In LSM mod options, enable the Safe Mode options
• Load your city
• When it loads, save it under a new file name
• Once saved, exit game to desktop

You should now be able to load that new save game without too many errors.

Remove broken transport lines

After sorting out the missing networks, you will probably still have some broken transport lines that need removing:

• Subscribe and enable Broken Nodes Detector mod
• Load your city
• In-game, press Ctrl + Zero (or Cmd + Zero on Macs)
• Use each of the tools:
  • Detect disconnected PT stops (repeat process until it's not finding any more)
  • Remove ghost nodes
  • Run detector (if it finds anything, move or bulldoze the pinned road/track/path)
• Now save your game under a new file name
• Once saved, exit game to desktop

Next time you load up, just to be extra careful, use the process listed in To remove missing networks section above.

Fixed?

If you still get the array index error shown in Symptoms section above, it could be some other cause of broken transport routes. You'll have to ask for help in the Steam forums, reddit, discord servers, etc.

Other issues? See: Troubleshooting