Game not working? Read this

[CO_Avanya]

First let's determine if it's a mod issue.

• Go to your Steam library
  
• Right click on Cities: Skylines and select "Properties"
  
• Type in --noWorkshop (exactly like that) in the box at the bottom
  
• Close the window to apply

Then start a new game. If the problem is gone - it was mods! If the problem remains, it's the game.

Next steps - how to fix it!

IF IT'S A MOD ISSUE

Following a major patch there's usually a brief period of instability while mods are being updated. Please see this thread for updates on what mods are currently broken and waiting for updates: https://steamcommunity.com/app/255710/discussions/0/5219148331330301161/

List of Working / Broken Mods

For a list of mods broken, abandoned or incompatible, please see this community list:
https://pdxint.at/BrokenModCS

A special thank you to AquilaSol and Chamëleon for making and updating this list!

Please be patient with mod creators - they spend their free time making mods and don't always have time right at launch. :)

You can also get some advice and help from our YouTube tutorial, made by Strictoaster:

https://youtu.be/UJ8_ITAG0dA

IF IT'S A GAME ISSUE

Our dedicated QA team try to catch all bugs, but with tons of different setups, we unfortunately don't always catch them all. If you encounter any or just need help, please use your support forum:
https://forum.paradoxplaza.com/forum/index.php?forums/support-bug-reports.879/

COMMON ISSUES

Running out of memory

Easy to spot in the error.log - usually the pagefile will have ~100MB or less free, which is why the game crashes. Setting up a custom size pagefile of 32 GB (32000 MB since pagefiles are measured in MB) usually fixes this. If the pagefile is already set that high, reduce the amount of workshop content.
- Guide to setting up a pagefile

Citrix Workspace

The output_log.txt (or player.log on Mac and Linux) looks like this:

Initialize engine version: 5.6.6f2 (6bac21139588)
GfxDevice: creating device client; threaded=1
Crash!!!
SymInit: Symbol-SearchPath: '.;D:/SteamLibrary/steamapps/common/Cities_Skylines;D:/SteamLibrary/steamapps/common/Cities_Skylines;C:/WINDOWS;C:/WINDOWS/system32;SRV*C:/websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 530
OS-Version: 10.0.17134 () 0x300-0x1
D:\SteamLibrary\steamapps\common\Cities_Skylines\Cities.exe:Cities.exe (00007FF68B9D0000), size: 23814144 (result: 0), SymType: '-exported-', PDB: 'D:\SteamLibrary\steamapps\common\Cities_Skylines\Cities.exe', fileVersion: 5.6.6.44065

- Remove Citrix and reinstall with one of the workarounds found here[forum.paradoxplaza.com].

Simulation errors

These happen from time to time. There are 3 mods that can help recover a save from these errors, and all mods can be used at the same time. It’s the Loading Screen Mod, Save Our Saves and Safenets.

https://steamcommunity.com/sharedfiles/filedetails/?id=2858591409
https://steamcommunity.com/sharedfiles/filedetails/?id=529129546
https://steamcommunity.com/sharedfiles/filedetails/?id=1620588636

Subscribe to all, enable them all, and then go to Options, find the Loading Screen Mod on the left, find Safe Mode and enable all options for Safe Mode.

Thank you for your patience and feel free to ask any questions you may have!

[CO_Avanya]

Publicado originalmente por Gimpozoid (RGZ):

I had the issue when showing the "Disk Write Error" while downloading.

I recommend you check out this thread on the forum, the suggestions and solutions might be helpful to your issue.
https://forum.paradoxplaza.com/forum/threads/a-javascript-error-occured-in-the-main-process-disk-write-error.1402169/

[dgrad598]

To all, if you have the old Load order mod, delete it and replace it with the new Load order mod. It worked for me and now I can play.

[Qui ædíficat]

These mods caused the problem in my case:
Extended managers library 1.0.3.
Loading order mod V1.15.7
Prop anarchy 0.7.6.
Tree anarchy 1.3.6.
I first looked in Steam content / my collections, my mod collection and there were 4 mods that were marked red (broken or depreciated). I have unsubscribed those. After that I restarted the game, and I could enter the game and load the city. With the help of the computability mod I could find the updated successors. Be aware there are more mods that cause some problems.

[coasterfreak0471]

If I'm still getting a "simulation error" due to "object not set on an instance" even when all mods are disabled AND starting on a completely fresh map, does that mean I need to unsubscribe from all mods and then add them one by one until I discover the one that breaks new game saves?

*EDIT* The reason why I ask is because up until this afternoon (my local timezone), a different save I opened was working just fine, with over 20 mods enabled and over 1400 subscribed assets (not necessarily in use). Game didn't behave abnormally during play, but now upon starting a fresh map, I keep getting these simulation errors. Even when mods are disabled, new starts are not fixed.

[shaneturner12]

Publicado originalmente por coasterfreak0471:

If I'm still getting a "simulation error" due to "object not set on an instance" even when all mods are disabled AND starting on a completely fresh map, does that mean I need to unsubscribe from all mods and then add them one by one until I discover the one that breaks new game saves?

*EDIT* The reason why I ask is because up until this afternoon (my local timezone), a different save I opened was working just fine, with over 20 mods enabled and over 1400 subscribed assets (not necessarily in use). Game didn't behave abnormally during play, but now upon starting a fresh map, I keep getting these simulation errors. Even when mods are disabled, new starts are not fixed.

Unfortunately disabling mods (unless you're excluding them using the Load Order Mod's Load Order Tool) won't work as disabled mods can still run code. You would have to unsubscribe problem mods.

[coasterfreak0471]

Publicado originalmente por shaneturner12:

Publicado originalmente por coasterfreak0471:

If I'm still getting a "simulation error" due to "object not set on an instance" even when all mods are disabled AND starting on a completely fresh map, does that mean I need to unsubscribe from all mods and then add them one by one until I discover the one that breaks new game saves?

*EDIT* The reason why I ask is because up until this afternoon (my local timezone), a different save I opened was working just fine, with over 20 mods enabled and over 1400 subscribed assets (not necessarily in use). Game didn't behave abnormally during play, but now upon starting a fresh map, I keep getting these simulation errors. Even when mods are disabled, new starts are not fixed.

Unfortunately disabling mods (unless you're excluding them using the Load Order Mod's Load Order Tool) won't work as disabled mods can still run code. You would have to unsubscribe problem mods.

How do I know which mods would be the problem ones? Unsubscribe from everything and then go one by one until it creates the error I got originally?

**EDIT** Just discovered that starting a new game on a base game map doesn't give me the error I had on a map I created. Does that mean I need to reload my created map in the editor and see if the error goes away, or is there a fatal error in the map that requires me to delete it entirely?

[the12deel]

Publicado originalmente por CO_Avanya:

First let's determine if it's a mod issue.

• Go to your Steam library
  
• Right click on Cities: Skylines and select "Properties"
  
• Type in --noWorkshop (exactly like that) in the box at the bottom
  
• Close the window to apply

Then start a new game. If the problem is gone - it was mods! If the problem remains, it's the game.

Next steps - how to fix it!

IF IT'S A MOD ISSUE

Following a major patch there's usually a brief period of instability while mods are being updated. Please see this thread for updates on what mods are currently broken and waiting for updates: https://steamcommunity.com/app/255710/discussions/0/5219148331330301161/

List of Working / Broken Mods

For a list of mods broken, abandoned or incompatible, please see this community list:
https://pdxint.at/BrokenModCS

A special thank you to AquilaSol and Chamëleon for making and updating this list!

Please be patient with mod creators - they spend their free time making mods and don't always have time right at launch. :)

You can also get some advice and help from our YouTube tutorial, made by Strictoaster:

https://youtu.be/UJ8_ITAG0dA

IF IT'S A GAME ISSUE

Our dedicated QA team try to catch all bugs, but with tons of different setups, we unfortunately don't always catch them all. If you encounter any or just need help, please use your support forum:
https://forum.paradoxplaza.com/forum/index.php?forums/support-bug-reports.879/

COMMON ISSUES

Running out of memory

Easy to spot in the error.log - usually the pagefile will have ~100MB or less free, which is why the game crashes. Setting up a custom size pagefile of 32 GB (32000 MB since pagefiles are measured in MB) usually fixes this. If the pagefile is already set that high, reduce the amount of workshop content.
- Guide to setting up a pagefile

Citrix Workspace

The output_log.txt (or player.log on Mac and Linux) looks like this:

Initialize engine version: 5.6.6f2 (6bac21139588)
GfxDevice: creating device client; threaded=1
Crash!!!
SymInit: Symbol-SearchPath: '.;D:/SteamLibrary/steamapps/common/Cities_Skylines;D:/SteamLibrary/steamapps/common/Cities_Skylines;C:/WINDOWS;C:/WINDOWS/system32;SRV*C:/websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 530
OS-Version: 10.0.17134 () 0x300-0x1
D:\SteamLibrary\steamapps\common\Cities_Skylines\Cities.exe:Cities.exe (00007FF68B9D0000), size: 23814144 (result: 0), SymType: '-exported-', PDB: 'D:\SteamLibrary\steamapps\common\Cities_Skylines\Cities.exe', fileVersion: 5.6.6.44065

- Remove Citrix and reinstall with one of the workarounds found here[forum.paradoxplaza.com].

Simulation errors

These happen from time to time. There are 3 mods that can help recover a save from these errors, and all mods can be used at the same time. It’s the Loading Screen Mod, Save Our Saves and Safenets.

https://steamcommunity.com/sharedfiles/filedetails/?id=2858591409
https://steamcommunity.com/sharedfiles/filedetails/?id=529129546
https://steamcommunity.com/sharedfiles/filedetails/?id=1620588636

Subscribe to all, enable them all, and then go to Options, find the Loading Screen Mod on the left, find Safe Mode and enable all options for Safe Mode.

Thank you for your patience and feel free to ask any questions you may have!

[shaneturner12]

Publicado originalmente por coasterfreak0471:

Publicado originalmente por shaneturner12:

Unfortunately disabling mods (unless you're excluding them using the Load Order Mod's Load Order Tool) won't work as disabled mods can still run code. You would have to unsubscribe problem mods.

How do I know which mods would be the problem ones? Unsubscribe from everything and then go one by one until it creates the error I got originally?

**EDIT** Just discovered that starting a new game on a base game map doesn't give me the error I had on a map I created. Does that mean I need to reload my created map in the editor and see if the error goes away, or is there a fatal error in the map that requires me to delete it entirely?

You may need to however your best bet would be to use the support forum linked in the post above as that will allow you to upload your output log

[zadexdx]

Publicado originalmente por CO_Avanya:

Publicado originalmente por Lestey7:

Game is crashing on startup from the launcher, I get to the Paradox loader and it just crashes. Seems everyone has the same issue, every DLC update is a troubleshooting nightmare. I think after the hours I've stuck into this I am just going to uninstall until CS2

Are you able to start the game if you add the launch options -noWorkshop and -disableMods to Steam?

How To Set Launch Options

• Right-click on the game title under the Library in Steam and select Properties.
  
• Enter the launch options you wish to apply in the box (be sure to separate each code with a space). Should look like this:
  

  -noWorkshop -disableMods

• Close the game's Properties window and launch the game.

Publicado originalmente por zadexdx:

Can you help me?
I clicked the start button but there isn't any game screen, or crash report
and on that button there is loading message, and also i can't stop the game
I try to fix it (reinstall the game or paradox launcher, upgrade the driver, add -force-d3d9 to the game launch options...)
But i couldn't find the solution :(

Please try the steps above and let me know if you're able to start the game with the launch options in place.

i tried that but it's not working

[mateusz.kunda]

Hi All, my game keeps crashing every (second) AutoSave. Here's my ouput log: https://file.io/rmIRnOMsAvlD
Will anyone be able to review this and help me understand what the cause might be, please?

[shaneturner12]

Publicado originalmente por mateusz.kunda:

Hi All, my game keeps crashing every (second) AutoSave. Here's my ouput log: https://file.io/rmIRnOMsAvlD
Will anyone be able to review this and help me understand what the cause might be, please?

Looking at the error I'd say it's to do with your graphics drivers (particularly if they have a VR option)

[Dinek05]

the game crashes at the end of loading without any information

[mateusz.kunda]

Publicado originalmente por shaneturner12:

Publicado originalmente por mateusz.kunda:

Hi All, my game keeps crashing every (second) AutoSave. Here's my ouput log: https://file.io/rmIRnOMsAvlD
Will anyone be able to review this and help me understand what the cause might be, please?

Looking at the error I'd say it's to do with your graphics drivers (particularly if they have a VR option)

Thank you for this

[CO_Avanya]

Publicado originalmente por zadexdx:

Publicado originalmente por CO_Avanya:

Are you able to start the game if you add the launch options -noWorkshop and -disableMods to Steam?

How To Set Launch Options

• Right-click on the game title under the Library in Steam and select Properties.
  
• Enter the launch options you wish to apply in the box (be sure to separate each code with a space). Should look like this:
  

  -noWorkshop -disableMods

• Close the game's Properties window and launch the game.

Please try the steps above and let me know if you're able to start the game with the launch options in place.

i tried that but it's not working

In that case we will need to see your output_log.txt (called player.log on Mac and Linux) to be able to help, which cannot be attached here on Steam. Please make a report on our support forum and attach it there so we can figure out what's happening.
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Depending on your operating system the log can be found here:

Windows
<SteamFolder>\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt
<Epic Games>\CitiesSkylines\Cities_Data\output_log.txt

Mac OS X
~/Library/Logs/Unity/Player.log

Linux
~/.config/unity3d/Colossal Order/Cities: Skylines/Player.log

[CO_Avanya]

Publicado originalmente por Dinek05:

the game crashes at the end of loading without any information

If you use mods please check your mods against the list of broken mods, both the first tab and especially the tab named Patch 1.16.1.
https://pdxint.at/BrokenModCS

If that doesn't help or you don't use mods, please make a thread on our support forum. We need to see your output_log.txt (called player.log on Mac and Linux) to be able to help, which cannot be attached here on Steam.
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Depending on your operating system the log can be found here:

Windows
<SteamFolder>\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt
<Epic Games>\CitiesSkylines\Cities_Data\output_log.txt

Mac OS X
~/Library/Logs/Unity/Player.log

Linux
~/.config/unity3d/Colossal Order/Cities: Skylines/Player.log