HRESULT 0x80100008 (SCARD_E_INSUFFICIENT

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The data buffer to receive returned data is too small for the returned data.

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SCARD_F_WAITED_TOO_LONG	SCARD_E_UNKNOWN_READER

SCARD_E_INSUFFICIENT_BUFFER

SCARD_E_INSUFFICIENT_BUFFER The receive buffer supplied to a smart-card API was smaller than the returned data. It is a caller-side buffer-size issue, not proof that the card returned malformed data.

How to avoid it

Follow the API's size-query pattern or use SCARD_AUTOALLOCATE only with functions that support it.
For SCardTransmit, allocate an explicit receive buffer: Microsoft documents that it does not support SCARD_AUTOALLOCATE.
For T=0, reserve room for the mandatory SW1 and SW2 status bytes even when no response payload is expected.

Microsoft: SCardTransmit

Microsoft: SCardListReaders

Microsoft: Smart Card Functions

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