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If your computer runs out of memory during the unpacking process, Error 11 occurs. Increasing the virtual memory gives the installer more "breathing room." unarc.dll returned an error code 11 sims 4
The installer tried to extract your game files, but it encountered data that was broken, incomplete, or tampered with. It is not a problem with your computer’s hardware (like RAM or hard drive), but a problem with the installation files themselves or the path where they are being installed . Happy Simming