axl_bool vortex_channel_send_errv ( VortexChannel channel,
int  msg_no_err,
const char *  format,

Printf-like version for vortex_channel_send_err.

Allows to send a ERR message type using a printf-like message format.

channel the channel where message reply will be sent.
msg_no_err the message number to reply to.
format a printf-like string format.
axl_true if message was sent of axl_false if fails
NOTE: See MIME considerations described at vortex_channel_send_msg which also applies to this function.