diff --git a/src/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/de/dhbwstuttgart/core/JavaTXCompiler.java
index 05edbaa1..8646b484 100644
--- a/src/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -41,11 +41,17 @@ public class JavaTXCompiler {
 
     final CompilationEnvironment environment;
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
+    Boolean log = true; //gibt an ob ein Log-File nach System.getProperty("user.dir")+"/test/logFiles/log" geschrieben werden soll?
 
     public JavaTXCompiler(File sourceFile) throws IOException, ClassNotFoundException {
         this(Arrays.asList(sourceFile));
     }
 
+    public JavaTXCompiler(File sourceFile, Boolean log) throws IOException, ClassNotFoundException {
+    	this(sourceFile);
+    	this.log = log;
+    }
+    
     public JavaTXCompiler(List<File> sources) throws IOException, ClassNotFoundException {
         environment = new CompilationEnvironment(sources);
         for (File s : sources) {
@@ -169,7 +175,7 @@ public class JavaTXCompiler {
 					return y; } )
 				.collect(Collectors.toCollection(HashSet::new));
 					varianceInheritance(xConsSet);
-    				Set<Set<UnifyPair>> result = unify.unifySequential(xConsSet, finiteClosure, logFile);
+    				Set<Set<UnifyPair>> result = unify.unifySequential(xConsSet, finiteClosure, logFile, log);
     				//Set<Set<UnifyPair>> result = unify.unify(xConsSet, finiteClosure);
     				System.out.println("RESULT: " + result);
     				logFile.write("RES: " + result.toString()+"\n");
diff --git a/src/de/dhbwstuttgart/typeinference/unify/TypeUnify.java b/src/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
index 69ed93b2..fa190cb7 100644
--- a/src/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
+++ b/src/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
@@ -8,16 +8,16 @@ import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 
 public class TypeUnify {
-	public Set<Set<UnifyPair>> unify(Set<UnifyPair> eq, IFiniteClosure fc, FileWriter logFile) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, true, logFile);
+	public Set<Set<UnifyPair>> unify(Set<UnifyPair> eq, IFiniteClosure fc, FileWriter logFile, Boolean log) {
+		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, true, logFile, log);
 		ForkJoinPool pool = new ForkJoinPool();
 		pool.invoke(unifyTask);
 		Set<Set<UnifyPair>> res =  unifyTask.join();
 		return res;
 	}
 	
-	public Set<Set<UnifyPair>> unifySequential(Set<UnifyPair> eq, IFiniteClosure fc, FileWriter logFile) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, false, logFile);
+	public Set<Set<UnifyPair>> unifySequential(Set<UnifyPair> eq, IFiniteClosure fc, FileWriter logFile, Boolean log) {
+		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, false, logFile, log);
 		Set<Set<UnifyPair>> res = unifyTask.compute();
 		return res;
 	}
diff --git a/src/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index ef2ae74c..0545fb95 100644
--- a/src/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -47,6 +47,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	private static final long serialVersionUID = 1L;
 	private static int i = 0;
 	private boolean printtag = false;
+	Boolean log = true; //gibt an ob ein Log-File nach System.getProperty("user.dir")+"/test/logFiles/log" geschrieben werden soll?
 	
 	public static final String rootDirectory = System.getProperty("user.dir")+"/test/logFiles/";
 	FileWriter logFile;
@@ -86,12 +87,13 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		rules = new RuleSet();
 	}
 	
-	public TypeUnifyTask(Set<UnifyPair> eq, IFiniteClosure fc, boolean parallel, FileWriter logFile) {
+	public TypeUnifyTask(Set<UnifyPair> eq, IFiniteClosure fc, boolean parallel, FileWriter logFile, Boolean log) {
 		this.eq = eq;
 		this.fc = fc;
 		this.oup = new OrderingUnifyPair(fc);
 		this.parallel = parallel;
 		this.logFile = logFile;
+		this.log = log;
 		rules = new RuleSet(logFile);
 	}
 	
@@ -320,13 +322,13 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					eqPrimePrimeSet.add(eqPrime);
 				else if(eqPrimePrime.isPresent()) {
 					//System.out.println("nextStep: " + eqPrimePrime.get());
-					TypeUnifyTask fork = new TypeUnifyTask(eqPrimePrime.get(), fc, true, logFile);
+					TypeUnifyTask fork = new TypeUnifyTask(eqPrimePrime.get(), fc, true, logFile, log);
 					forks.add(fork);
 					fork.fork();
 				}
 				else {
 					//System.out.println("nextStep: " + eqPrime);
-					TypeUnifyTask fork = new TypeUnifyTask(eqPrime, fc, true, logFile);
+					TypeUnifyTask fork = new TypeUnifyTask(eqPrime, fc, true, logFile, log);
 					forks.add(fork);
 					fork.fork();
 				}
@@ -1212,11 +1214,13 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	}
 	
 	void writeLog(String str) {
-		try {
-			logFile.write(str+"\n");
-			logFile.flush();
+		if (log) {
+			try {
+				logFile.write(str+"\n");
+				logFile.flush();
 			
-		}
-		catch (IOException e) { }
+			}
+			catch (IOException e) { }
+			}
 	}
 }