3:2017/09/25 14-55-55:gwen(31841):args.c: 317: Option "size" needed ERROR: Error in argument list (-1)

MemCard2 - A tool to read/write data from/to a memory chip card (c) 2006 Martin Preuss<martin@libchipcard.de> This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. [--logtype=PARAM] Set the logtype (console, file). [--loglevel=PARAM] Set the log level (info, notice, warning, error). [--logfile=PARAM] Set the log file (if log type is "file"). [-v] [--verbous] Every occurrence of this option increases the verbosity. [--verify] Verify data after writing it to the card. [-a PARAM] [--offset=PARAM] Offset to start reading/writing at. -s PARAM --size=PARAM Number of bytes to read/write. [-f PARAM] [--filename=PARAM] File to read/write. [-p PARAM] [--pin=PARAM] Pin. [-h] [--help] Shows this help.