ERROR_SXS_UNKNOWN_ENCODING_GROUP - 14012 (0x36BC)
The encoding group identifier specified is not recognized.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_SXS_UNKNOWN_ENCODING_GROUP indicates that a specified encoding group identifier is not recognized by the system. This typically occurs in scenarios involving side-by-side assemblies and manifest files.
Error Details
This error is specific to the Side-by-Side (SXS) assembly management subsystem, which handles versioning and deployment of multiple versions of the same application or component on a single machine. The encoding group identifier is used to identify a particular set of rules for handling character encodings within these assemblies.
Usage Context
This error can be encountered when attempting to load an assembly that references an unrecognized encoding group, which may indicate issues with manifest files, configuration settings, or the SXS store itself.
Developer Interpretation
Developers should interpret this error as a sign that there is a mismatch between the expected and actual encoding group identifiers. This could be due to incorrect configuration in manifest files, corrupted assembly metadata, or misconfigured deployment environments.
Related Errors
ERROR_SXS_CORRUPT_MANIFEST(14002): Indicates corruption within an SXS manifest file.ERROR_SXS_MULTIPLE_DEFS(14003): Occurs when multiple definitions are found for a particular assembly version.ERROR_SXS_FILE_HASH_MISMATCH(14005): Indicates that the hash of an assembly does not match expected values in the manifest.
FAQ
Q: What causes this error?
A: This error typically occurs due to incorrect or missing encoding group identifiers in manifest files or configuration settings. It can also be caused by corrupted SXS store data.
Q: How can I resolve it?
A: Verify the correctness of manifest files and ensure that all references to encoding groups are accurate. If corruption is suspected, consider repairing or reinstalling affected assemblies.
Summary
The ERROR_SXS_UNKNOWN_ENCODING_GROUP error signifies a failure in recognizing an expected encoding group identifier within SXS assemblies. Developers should focus on validating manifest files and ensuring correct configuration settings to resolve this issue.