diff --git a/ws2012/P2P/uebungen/4/src/Main.java b/ws2012/P2P/uebungen/4/src/Main.java
index 4de3460f..cca6e073 100644
--- a/ws2012/P2P/uebungen/4/src/Main.java
+++ b/ws2012/P2P/uebungen/4/src/Main.java
@@ -44,9 +44,14 @@ public class Main {
 
 				switch (cmd) {
 				case "spawn":
-					Node newNode = nodes.get(node).spawn();
-					String newNodeName = splitted[2];
-					nodes.put(newNodeName, newNode);
+					if (splitted.length > 2) {
+						Node newNode = nodes.get(node).spawn();
+						String newNodeName = splitted[2];
+						nodes.put(newNodeName, newNode);
+					} else {
+						System.out
+								.println("Please enter a name for the new node.");
+					}
 					break;
 				case "leave":
 					Node theNode = nodes.get(node);