diff --git a/scripts/network.gd b/scripts/network.gd
index 7dc0594..6745541 100644
--- a/scripts/network.gd
+++ b/scripts/network.gd
@@ -9,7 +9,6 @@ const UDPRX_PROTO: = {'udprx': navi.NaviSource}
 
 var tick: int = 0
 
-signal socket_error(args)
 
 class Serial extends SerialPort:
     func send_to(data: PackedByteArray): return write_raw(data)
@@ -279,9 +278,11 @@ func _process(_delta: float) -> void:
         var unit_udp = units_udp[addr]
         if Error.OK == unit_udp.process(tick):
             var sock = send_sockets[unit_udp.name]
-            sock.send_to([addr[0], dst_ports[addr]], unit_udp.tx_data.slice(0, unit_udp.tx_len))
+            var dst_port = dst_ports[addr]
+            var tx_data = unit_udp.tx_data.slice(0, unit_udp.tx_len)
+            sock.send_to([addr[0], dst_port], tx_data)
     for addr in units_udprx:
-        var unit_udprx = units[addr]
+        var unit_udprx = units_udprx[addr]
         unit_udprx.process(tick)
     for key in units_serial:
         var unit_serial = units_serial[key]