Windows error 14007 (ERROR_SXS_KEY_NOT

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A lookup key was not present in any side-by-side activation context active on the current thread.

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ERROR_SXS_ACTIVATION_CONTEXT_DISABLED	ERROR_SXS_VERSION_CONFLICT

ERROR_SXS_KEY_NOT_FOUND

ERROR_SXS_KEY_NOT_FOUND means that Windows searched the activation contexts currently active for the requested key and did not find it. The key can identify a value in a particular SxS section, so the result may reflect the wrong context, the wrong query, or missing manifest data.

What to check

Confirm that the intended context is active on the calling thread when the lookup occurs.
Verify the key and section requested by the API against the manifest content produced by the build.
Check nested activation scopes: an inner scope can change which binding data Windows sees.

Do not treat the error as a generic registry or file lookup failure; it refers specifically to active activation-context data.

Microsoft: activation contexts

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