| Previous | Next |
| SL_E_PLUGIN_NOT_REGISTERED | SL_E_AUTHN_MISMATCHED_KEY |
SL_E_AUTHN_WRONG_VERSION
SL_E_AUTHN_WRONG_VERSION: diagnose the owning boundary
SL_E_AUTHN_WRONG_VERSION (0xC004F077) is documented as The Software Licensing Service determined incompatible version of authentication data. Treat that wording as the specific licensing authentication protocol version boundary; it is more useful than a generic “component failed” label.
Evidence that matters
Record the client/service protocol versions and the endpoint involved. Align supported versions before retrying; an activation key change cannot repair a protocol-version mismatch.
Interpretation and verification
Keep the affected object and caller identity stable while changing only the rejected prerequisite. The correction is proven when the original operation crosses this boundary with the intended state or output. If a different HRESULT appears afterward, preserve it as a separate later-stage result rather than folding it back into SL_E_AUTHN_WRONG_VERSION.
Technical references
Looking for a different code? Search another status or error code.