Sims 4 Error Message Game Already Running

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4 Detect if a copy of IsUninst.exe is running, if so end the task. Press Ctrl + Alt + Delete. Select Task Manager. Select the Processes tab. Look for IsUninst.exe. If it is running, select it and click End Process. Select Yes to the Task Manager Warning dialog. 5 Delete all instances of IsUninst.exe. The Sims 4 is already running. I have uninstalled both Origin and the Sims several times, cleared everything out of the Task Manager (even though there is nothing Sims or Origin related) rebooted my computer several times, and even tried given access to my Pictures b/c of some random advice on another thread. Or maybe you have a steam issue and you need to uninstall Steam, clean your device with this, restart your PC or Notebook and restart your device then try to run game The Sims 4 and Failed to start game 'app already running' will wanish. This is for: Windows 7 32 bits / 64 bits - Windows 8 32 bits / 64 bits - Windows 8.1 32 bits / 64 bits. Verify xbin files.bat. Delete all the rest. Download 'no-origin-fix-1.rar' and put in the folder with other files. Now run 'verify xbin files.bat'. If it says some files are corrupted (crc mismatch), redownload them. Disable anti-virus just in case and run the setup.

MCCC’s Error Notifications

Sims 4 players using MC Command Center have some extra insurance against using broken mods or cc, in the form of error-catching. Depending on where in game code an error happens, it could either be generated as a MCCC log error, or as a lastException.

I’ll show you where to find both file types.

Here’s what the notification for MCCC logs looks like:

For translating, here’s what it says:

ERROR LOGGED

A script error has been logged to the mc_cmd_center.log file located in the same folder as the MC Command Center modules. As this error may be a result of a bug in MCCC, please notify Deaderpool about it! Thanks!

This rectangular message is seen less often than the more-square (larger) notification for lastExceptions, which will be covered below.

The next picture shows you where to look on your (Windows) computer for the log file. Depending on your OS settings, you may or may not see .log or LOG. If you don’t, it should be shown as a Text Document.

There are three files in the MCCC folder named mc_cmd_center, the mod files (package and ts4script), and the text/log file, which is the file (highlighted in blue) to bring us, if you come to Deaderpool’s Discord for help.

Here’s what the notification for lastExceptions looks like:

For translating, here’s what it says:

LAST EXCEPTION CAUGHT BY MCCC

A script error has been logged to the LastException.txt file located in the Sims 4 folder. This error almost always happens as a result of bad or out-of-date mods or CC, but sometimes it can be an EA script error as well. It will continue to happen until the mods or cc are removed or updated. In the Troubleshooting documentation in the MCCC website help menu, there is a suggestion on how to track-down bad or out of date custom content. Thanks!

The next picture shows you where to look on your (Windows) computer for the lastException file. It should be shown as a Text Document in your /Sims 4 folder. That’s the file (highlighted in blue) to bring us, if you come to Deaderpool’s Discord for help.

Some extra information on error messages: In your /Sims 4 folder, you may see 3 different types of error files. Their names all begin with “last” and they are all text files.

lastCrash: usually from old or broken custom content.
lastException: any mod, cc or EA (game code) error not caught by the other file types.
lastUIException: usually user-interface mods needing updated (weerbesu at MTS, for example).

Of the 3, the best one to show us on Discord is the lastException. (By the way, drag and drop is Very Handy on Discord!!) The other 2 types, we can only tell you what I’ve already said here. Other than “you need to sort through your mods and cc,” which is detailed in this post.

One more thing, if you see any “last” file with numbers added to the name, those are old. The ones with no numbers added are fresh. Any with numbers can be deleted, they won’t tell us what’s going on NOW in your game.

We really only need the ONE (newest) file, when you come to visit us.

Full game name: The Sims 4

Release date: 2014. Failed to start game 'app already running'

More errors for The Sims 4 ?

i mean that error (Failed to start game 'app already running') ?

Then what you need to do is to restart your PC or Laptop and then try to run game again.

Or maybe you have a steam issue and you need to uninstall Steam, clean your device with this, restart your PC or Notebook and restart your device then try to run game The Sims 4 and Failed to start game 'app already running' will wanish.

This is for : Windows 7 32 bits / 64 bits - Windows 8 32 bits / 64 bits - Windows 8.1 32 bits / 64 bits

The Sims 4

The steps of this guide can be followed by any user of PC or Laptop.

You need Expert skills to fix this error ?

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Hell NO

Note ! The easy way to fix this is to clean all windows traces and registry (cleaning tool available in downloads tab) then restart your PC and try again.

This tutorials is for following operating systems:

Windows 7 32 bits / 64 bits (x64 and x86)

Windows 8 32 bits / 64 bits (x64 and x86)