oof these are tough. simulation failed is usually due to network missing like a custom road especially if it was used with timed traffic lights from TMPE. Are you using any mods that add roads besides Network Extension 2? Would be good to know your mod list.

I have had that in this circumstance: Playing the game, quit to the main menu, do something from the main menu (check assets or mods, visit the workshop, etc) then try to restart the game. Then I get that error. What I have found works is to exit back to the desktop - not the main menu, close the desktop screen, restart Steam and proceed normally.

Share log file so we can see full error details

How to find & share log file: https://github.com/krzychu124/Cities-Skylines-Traffic-Manager-President-Edition/wiki/Share-your-Cities-Skylines-log-file

Originally posted by aubergine18:

Share log file so we can see full error details

How to find & share log file: https://github.com/krzychu124/Cities-Skylines-Traffic-Manager-President-Edition/wiki/Share-your-Cities-Skylines-log-file

I have got the log file but i have a stupid question.... how to upload the file to here?

You can't upload it to steam, it has to be uploaded to something like google drive, dropbox or similar.

Thanks @aubergine18, too obvious i am getting old :P

Log file: https://drive.google.com/file/d/1BzeCo5tw4Opsi_xWHmlQ9pKenoZwj_DR/view?usp=sharing

Looks like you tried to load a save more than once in same session. Most mods will break when you do that. Always exit to desktop first, before loading another save.

There are lots of other problems in the log as well, will post more detail in a moment...

Realistic Vehicle Speed - it conflicts with TM:PE, use one or the other, not both. (TM:PE has it's own vehicle speed feature; I suggest switching over to the LABS version of TM:PE as it has some good bug fixes and improved driving styles)

More Beautification - Old, causes lag. Use Find It! mod instead.

Sharp Junction Angles is old and broken. Use Fine Road Tool and Fine Road Anarchy mods (both of them) instead.

New Roads for Network Extensions 2 - this mod is broken and game breaking. Unsubscribe it, and subscribe to the compatibility version instead (remember to enable it in content manager).

Multi track station enabler is outdated, unsubscribe it. Use Advanced Stop Selection instead.

Larger Footprints is old. Not sure if it's game breaking, but avoid any building assets that use it.

Slow speed looks like it's broken, and it's no longer maintained. Suggest unsubscribe it.

Custom Light Effects causes memory leaks and can crash game. Suggest unsubscribe it and any assets that use it.

You have two tile mods Big City and Max Area - use one of them, unsubscribe the other.

Advanced Road Anarchy - no longer in workshop, you'll have to remove it from Main Menu > Content Manager > Mods > Advanced Road Anarchy > Unsubscribe

You have both Improved Public Transport 2 and Transport Lines Manager installed. They are incompatible with each other; choose one of them, but unsubscribe the other.

If you still have issues after cleaning up the mods, upload a new version of the log file and post link and I'll take a look.

Thanks @aubergine18!! I have done the clean as your suggestion but i still get the same error when loading the game :(

New log file: https://drive.google.com/file/d/1CHUsQ5wNshWvxzz2TkGeWZcMFyavfB9a/view?usp=sharing

Log file is looking cleaner now, so that's a good start.

Subscribe and enable Safenets mod will fix one of your errors.

Unsubscribe Prop Fine tune mod will fix another.

Also consider unsubscribing No Pillars mod as it causes some bugs with broken nodes / segments.

Unsubscribe Roads United Europe.

Try that and see what happens. If still errors, upload a new log file :)

Thanks @aubergine18!! But still :(

https://drive.google.com/open?id=1HMILiZ2Vuor4s71fcDBG_bfJUu8zOc2Z

Looks like you forgot to enable the Safenets mod?

Also, Ultimate Eye Candy mod is throwing some errors, so try unsubscribe that.

And there are lots of DirectX 11 errors too; try adding the -force-d3d9 launch parameter

https://steamcommunity.com/sharedfiles/filedetails/?id=466981085

Originally posted by aubergine18:

Log file is looking cleaner now, so that's a good start.

Subscribe and enable Safenets mod will fix one of your errors.

Unsubscribe Prop Fine tune mod will fix another.

Also consider unsubscribing No Pillars mod as it causes some bugs with broken nodes / segments.

Unsubscribe Roads United Europe.

Try that and see what happens. If still errors, upload a new log file :)

Solid Solid Solid help!!! Safenets saved one of my cities and this is great advice overall!