Decompression error code -11 (often appearing as "unarc.dll returned an error code: -11") typically occurs during the installation of large, highly compressed software—most commonly video game "repacks"
Z_DATA_ERROR
Error code -11 in decompression contexts almost universally maps to (zlib) or a equivalent low-level stream corruption signal. It means: The input data stream is invalid, incomplete, or corrupted relative to the expected compression format.
Boot
Newer high-core CPUs (like the Intel i9 14900K) can sometimes cause extraction logic to fail due to timing or compatibility issues. Press Win + R , type msconfig , and hit Enter. Navigate to the tab and click Advanced options .
Snapmaker U1
Snapmaker 2.0
Snapmaker Artisan
Snapmaker Ray
Snapmaker J1/J1s
