ERR_ECMDUNKNOWN
case ERR_ECMDUNKNOWN:
if (err != ERR_ECMDUNKNOWN ||
if (err != ERR_ECMDUNKNOWN ||
if (err != ERR_ECMDUNKNOWN ||
err = ERR_ECMDUNKNOWN;
if ((err == ERR_ECMDUNKNOWN) ||
if (err != ERR_ECMDUNKNOWN ||
if (err != ERR_ECMDUNKNOWN ||
if (err == ERR_ECMDUNKNOWN)