diff --git a/commander.html b/commander.html
index f7f62df..b864912 100644
--- a/commander.html
+++ b/commander.html
@@ -198,10 +198,10 @@
 
       function getBoatLog(e)
       {
-         let cmd = prompt("enter command");
+         // let cmd = prompt("enter command");
          let boat = getDataFomEl(e.target);
-         console.log("send cmd", boat, cmd);
-         conn.send(passEl.value + ";sendcmd;" + boat['id'] + ";" + cmd);
+         // console.log("send cmd", boat, cmd);
+         // conn.send(passEl.value + ";sendcmd;" + boat['id'] + ";" + cmd);
 
          conn.send(passEl.value + ";sendcmd;" + boat['id'] + ";servotrim:0");
          conn.send(passEl.value + ";sendcmd;" + boat['id'] + ";servotrim:1");
diff --git a/ground-station.py b/ground-station.py
index e594bfd..adafa92 100644
--- a/ground-station.py
+++ b/ground-station.py
@@ -130,15 +130,16 @@ async def getlog(client, data):
 
 async def sendcmd(data):
     """send command to boat"""
-    for b in Boats:
-        if b['id'] == data[2]:
-            del data[0]
-            del data[1]
-            del data[2]
-            print(data)
-            data = ";".join(data)
-            await sendToBoat(b, data + "\n")
-            return
+    if len(data) > 3:
+        for b in Boats:
+            if b['id'] == data[2]:
+                del data[0]
+                del data[1]
+                del data[2]
+                print(data)
+                data = ";".join(data)
+                await sendToBoat(b, data + "\n")
+                return
 
 async def kick_client(clientId):
     """kick a client"""
@@ -159,7 +160,7 @@ async def on_message(message, client):
     data = message.replace('\n', '').split(';')
     if data[0] != client["id"]:
         print("invalid id: " + str(data[0]) + " != " + str(client["id"]))
-    else:
+    elif len(data) >= 2:
         if   data[1] == "boats":
             await echo_boats(client)
         elif data[1] == "ctrl":
@@ -192,6 +193,8 @@ async def on_message(message, client):
             print("WARN: invalid command (admin): '" + data[1] + "'")
         else:
             print("WARN: invalid command (" + client['id'] + "): '" + data[1] + "'")
+    else:
+        print("WARN: to little arguments")
 
 async def new_client(clientId, ws):
     """handler for every new client connection"""