If none of the above works, you might have a truly corrupted download. This is rare for error -14, but possible.
Pro tip: Use a download manager like JDownloader2 or Free Download Manager to avoid fragmented downloads.
Some repack installers use outdated DLLs. Download latest unarc.dll and isdone.dll from a trusted source (e.g., DLL-files.com). Place them in:
Some repack installers are compiled as 32-bit applications. A 32-bit app cannot use more than 2GB of RAM by default. When the decompressor tries to load a huge file, it hits the 2GB wall and throws Error -14. how to fix unarcdll returned an error code14 upd
Unlike other errors (like -1 or -6), Error -14 specifically points to a CRC mismatch caused by memory or disk issues.
The unarc.dll returned an error code -14 is not a hardware failure. It is not a virus. And in 90% of cases, it is not a corrupted download. It is Windows getting in the way of itself—through permissions, memory limits, or disk format restrictions.
Start with Step 1 and work your way down. Most users fix the issue by Step 3 (virtual memory) or Step 4 (NTFS conversion). If you’re still stuck after Step 7, consider using a different repack or a portable version of the software. If none of the above works, you might
Have you fixed your error? Share your experience and help others by commenting below (if on a forum or blog). Good luck, and may your installations be error-free.
Word count: ~1,450
Let’s break down the technical jargon into plain English. Pro tip: Use a download manager like JDownloader2
However, the archive rarely is broken. The real culprits are:
Few things are more frustrating than waiting for a large game or software to finish installing, only to be hit with the error: "unarc.dll returned an error code -14."
This error typically appears when using Setup Factory or Panda3D installers (common for repacks from groups like FitGirl, DODI, or CorePack). It usually means your computer either has corrupted data or is running out of resources.
Below is a step-by-step guide to fixing Error Code -14 for good.