Open eCard

Caused by: sun.security.smartcardio.PCSCException: Unknown error 0x54f
    at sun.security.smartcardio.PCSC.SCardConnect(Native Method)
    at sun.security.smartcardio.CardImpl.<init>(Unknown Source)

I suppose only Reiner can answer what the error code 0x54f means.

Unless there is a way to reproducibly trigger this error, there is nothing I can do.

Java smartcardio has been replaced with a better JNA based version. Apart from that the error is as stated 2 years ago only indicated by a internal error code.

Feel free to reopen the issue in case this still occurs in current versions of the OeC.