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SCARD_E_UNSUPPORTED_FEATURE
SCARD_E_UNSUPPORTED_FEATURE The smart card does not implement the requested feature. It is a capability mismatch: the reader may be healthy and the card may authenticate normally, while a particular command or provisioning action is unsupported.
What to do
- Identify the exact PC/SC feature, card command, or provider operation that was requested.
- Check the card profile and supported minidriver features instead of attempting the same unsupported command repeatedly.
- Implement a documented fallback only when the application protocol supports one; do not substitute a different security operation silently.
Microsoft: Smart Card architecture
Microsoft: Smart Card Minidrivers
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