/socklisten: port error (line 67,script1.mrc)

hello, I have forgotten what you do to remedy this issue. Can someone help remind me please?

I really appreciate it, thanks.

Line 67 is /socklisten Open.

Code:
_conn {
  if ($sock(_conn)) sockclose _conn
  if ($sock(Open)) sockclose open
  socklisten Open
  .server 127.0.0.1 $Sock(Open).port
  if (!$timer(_dc)) .timer_dc 0 69 /_dc
}