diff --git a/src/de/dhbwstuttgart/logger/Logger.java b/src/de/dhbwstuttgart/logger/Logger.java
index c1bbd93e..725c6fd5 100755
--- a/src/de/dhbwstuttgart/logger/Logger.java
+++ b/src/de/dhbwstuttgart/logger/Logger.java
@@ -94,6 +94,7 @@ public class Logger {
 
 	public static String getWholeLog(){
 		String ret = "";
+		LOG_HISTORY.removeIf((logLine)->logLine==null);
 		Logger.LOG_HISTORY.sort((log1, log2)->log1.timestamp.compareTo(log2.timestamp));
 		ret += Logger.LOG_HISTORY.toString();
 		return ret;
diff --git a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
index 66553dc9..06069bc6 100644
--- a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
+++ b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
@@ -15,6 +15,7 @@ import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.SuperWildcardType;
 import de.dhbwstuttgart.syntaxtree.type.Type;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.syntaxtree.type.Void;
 import de.dhbwstuttgart.syntaxtree.type.WildcardType;
 import de.dhbwstuttgart.typeinference.ConstraintsSet;
 import de.dhbwstuttgart.typeinference.EinzelElement;
@@ -171,6 +172,7 @@ public class UnifyTypeFactory {
 
 	public static Type convert(ReferenceType t) {
 		//TODO: Hier kann man die GTVs extrahieren
+		if(t.getName() == "void")return new Void(NULL_NODE, 0);
 		RefType ret = new RefType(t.getName(),null,0);
 		ret.set_ParaList(convert(t.getTypeParams()));
 		return ret;
diff --git a/test/unify/UnifyTest.java b/test/unify/UnifyTest.java
index d4f36b39..825fd40d 100644
--- a/test/unify/UnifyTest.java
+++ b/test/unify/UnifyTest.java
@@ -850,6 +850,38 @@ public class UnifyTest {
 		//Assert.assertEquals(expected, actual);
 	}
 	
+	@Test
+	public void unifyTestVector(){
+		/*
+		 * Vector<T2> < T1
+		 * T1 < Vector<String>
+		 */
+		TypeFactory tf = new TypeFactory();
+		FiniteClosureBuilder fcb = new FiniteClosureBuilder();
+
+		UnifyType tphT1 = tf.getPlaceholderType("T1");
+		UnifyType tphT2 = tf.getPlaceholderType("T2");
+
+		UnifyType gtv = tf.getSimpleType("gtv");
+		UnifyType vector = tf.getSimpleType("Vector", gtv);
+		UnifyType vectorE = tf.getSimpleType("Vector", tphT2);
+		UnifyType string = tf.getSimpleType("String");
+		UnifyType vectorString = tf.getSimpleType("Vector", string);
+		
+		fcb.add(vector, vector);
+		
+		IFiniteClosure fc = fcb.getFiniteClosure();
+		
+		Set<UnifyPair> eq = new HashSet<UnifyPair>();
+		eq.add(new UnifyPair(tphT1, vectorString, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(vectorE, tphT1, PairOperator.SMALLERDOT));
+
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
+		
+		System.out.println("Test OverloadingVector:");
+		System.out.println(actual);
+	}
+	
 	@Test
 	public void unifyTestOverloading(){
 		/*