diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index eea7eea..430c193 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachMgrBasic.cpp b/MachMgrBasic.cpp
index 8bb4ed6..4c8a080 100644
--- a/MachMgrBasic.cpp
+++ b/MachMgrBasic.cpp
@@ -31,7 +31,7 @@ CreateMachMgr( void)
 {
   // verifico la chiave e le opzioni
    if ( ! TestKeyForEMk( GetEMkKey(), 0, GetEMkLogger()))
-      return false ;
+      return nullptr ;
   // creo il MachMgr 
    return static_cast<IMachMgr*> ( new(nothrow) MachMgr) ;
 }