![]() In this situation, the Usbccid.sys driver returns a STATUS_DEVICE_PROTOCOL_ERROR error. However, some smartcards ignore the Le field and return more data than the application expects. As defined in Application Protocol Data Unit (APDU) protocol, a Le field is set to indicate the maximum number of data bytes for the response that is returned from the smartcard. Typically, a smartcard application calls the SCardTransmit function to send a service request to a smartcard and expects to receive data back from the smartcard. This issue occurs because the smartcards return more information to the application than the application expects to receive. For example, you may encounter this issue when you use ActivClient. Additionally, the application may stop responding. When this issue occurs, the application does not work correctly. However, the application cannot retrieve information from the smartcards. On a computer that is running Windows Vista or Windows Server 2008, you use an application together with a smartcard reader to read information from smartcards. ![]()
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