HRESULT 0x80100015 (SCARD_E_INVALID_ATR): meaning and diagnosis

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An ATR obtained from the registry is not a valid ATR string.

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SCARD_F_UNKNOWN_ERROR	SCARD_E_NOT_TRANSACTED

SCARD_E_INVALID_ATR

SCARD_E_INVALID_ATR An ATR stored in the smart-card registration data is not a valid ATR string. The ATR is the card's reset response and is used by Windows to identify and pair the inserted card with its minidriver.

What to check

Read the ATR reported by SCardStatus and compare it with the card-registration data supplied by the issuer or minidriver.
Check whether a stale or manually edited card registration remains after middleware or driver changes.
Install the supported minidriver again instead of manually guessing ATR registry values.

Microsoft: SCardStatus

Microsoft: Smart Card Plug and Play

Microsoft: Smart Card Minidrivers

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