1 files changed, 7 insertions, 0 deletions
diff --git a/geldschieberbot.py b/geldschieberbot.py
index 80dedb7..e13b124 100644
--- a/geldschieberbot.py
+++ b/geldschieberbot.py
@@ -330,6 +330,10 @@ cmds["nimm"] = transaction
 def cars(sender, args, msg):
     # list cars
     if len(args) < 2 or args[1] in ["ls", "list"]:
+        if len(available_cars) == 0:
+            send("No cars registered yet.")
+            return 0
+
         ret_msg = ""
         header_fmt = "{} - service charge {}ct/km\n"
         if len(args) > 2:
@@ -380,6 +384,9 @@ def cars(sender, args, msg):
             nb[m] = 0
         balance[car] = nb
         send("added {} as an available car".format(car))
+    else:
+        send('ERROR: cmd not in form "{} [cmd]"'.format(args[0]))
+        return 1
 
     return 0