HRESULT 0x80100006 (SCARD_E_NO_MEMORY): meaning and diagnosis

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Description:

Not enough memory available to complete this command.

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SCARD_E_INVALID_TARGET	SCARD_F_WAITED_TOO_LONG

SCARD_E_NO_MEMORY

SCARD_E_NO_MEMORY The smart-card subsystem could not allocate enough memory to complete the request. It can be caused by application pressure, a Resource Manager issue, or a driver problem; it does not necessarily mean that the card has no nonvolatile storage left.

How to narrow it down

Record the API that failed and whether the condition appears only under load or also in a minimal PC/SC test.
Release buffers returned through SCARD_AUTOALLOCATE with SCardFreeMemory and release unneeded contexts promptly.
Inspect Smart Card service events and reader-driver stability before assuming a card hardware fault.

Microsoft: Smart card events

Microsoft: Smart Card Functions

Microsoft: SCardEstablishContext

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