diff --git a/AutoNester.cpp b/AutoNester.cpp
index 820e7fe..8c5bbbe 100644
--- a/AutoNester.cpp
+++ b/AutoNester.cpp
@@ -30,7 +30,7 @@ CreateAutoNester( void)
 {
   // verifico la chiave e le opzioni
    if ( ! TestKeyForENs( GetENsKey(), 0, GetENsLogger()))
-      return false ;
+      return nullptr ;
   // creo il NestMgr 
    return static_cast<IAutoNester*> ( new(nothrow) AutoNester) ;
 }
diff --git a/EgtNesting.rc b/EgtNesting.rc
index e2286d1..64f15a3 100644
Binary files a/EgtNesting.rc and b/EgtNesting.rc differ