diff --git a/Hazard/Hazard/Hazard.vcxproj b/Hazard/Hazard/Hazard.vcxproj
index 10fce30..bb18d5a 100644
--- a/Hazard/Hazard/Hazard.vcxproj
+++ b/Hazard/Hazard/Hazard.vcxproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,13 +19,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v100</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
diff --git a/Hazard/Hazard/PrimImplikantCollection.cpp b/Hazard/Hazard/PrimImplikantCollection.cpp
index e834196..0bd57ba 100644
--- a/Hazard/Hazard/PrimImplikantCollection.cpp
+++ b/Hazard/Hazard/PrimImplikantCollection.cpp
@@ -1,3 +1,4 @@
+//#include <iostream>
 #include "stdafx.h"
 #include <string>
 #include <vector>
@@ -60,4 +61,14 @@ PrimImplikant* PrimImplikantCollection::front()
 PrimImplikant* PrimImplikantCollection::at(unsigned int const &index)
 {
 	return this->PIVector.at(index);
-}
\ No newline at end of file
+}
+
+/*PrimImplikant* PrimImplikantCollection::operator[](unsigned int const &index){
+	if (index <= PIVector.size()){
+
+		return this->PIVector.at(index);
+	}
+
+	cerr << "Fehler!!!!  PIVector.size()=" << PIVector.size() << endl;
+	return 0;
+}*/
\ No newline at end of file
diff --git a/Hazard/Hazard/PrimImplikantCollection.h b/Hazard/Hazard/PrimImplikantCollection.h
index 4bd5151..0b4c474 100644
--- a/Hazard/Hazard/PrimImplikantCollection.h
+++ b/Hazard/Hazard/PrimImplikantCollection.h
@@ -1,3 +1,4 @@
+//#include <iostream>
 #include <string>
 #include <vector>
 #include "PrimImplikant.h"