What does HRESULT 0x8010000B (SCARD_E_SHARING_VIOLATION) mean?

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The smart card cannot be accessed because of other connections outstanding.

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SCARD_E_TIMEOUT	SCARD_E_NO_SMARTCARD

SCARD_E_SHARING_VIOLATION

SCARD_E_SHARING_VIOLATION Another connection already holds the smart card in a way that conflicts with the requested access. This often occurs when one application uses exclusive sharing or holds a transaction while another application tries to connect or transmit.

What to check

Inspect the requested SCARD_SHARE_* mode and whether another application, service, or middleware component has the card open.
Use shared access when the operation permits it, and reserve exclusive access for short critical sections only.
Make sure every successful SCardBeginTransaction has a matching SCardEndTransaction even when an error path is taken.

Microsoft: SCardConnect

Microsoft: SCardBeginTransaction

Microsoft: SCardEndTransaction

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