diff --git a/cg/cg4200.cpp b/cg/cg4200.cpp
index 8e1f9e6fe..2c879c950 100755
--- a/cg/cg4200.cpp
+++ b/cg/cg4200.cpp
@@ -29,7 +29,7 @@ public:
 bool TCopia_archivi::copyfile(int logicnum, long from, long to)
 {
   if (from > 0)  set_firm(from);
-  else prefhndl->set("com");
+  else prefix().set("com");
   TSystemisamfile file(logicnum);
   TFilename t; t.tempdir(); t << "/tr" << logicnum;
   
@@ -82,7 +82,7 @@ void TCopia_archivi::clearivd(long to)
 void TCopia_archivi::copyivd(long from, long to)
 {
   if (from > 0) set_firm(from);
-  else prefhndl->set("com");
+  else prefix().set("com");
   TLocalisamfile pcon(LF_PCON);
   TAssoc_array riclass;
 
@@ -170,7 +170,7 @@ bool TCopia_archivi::menu(MENU_TAG)
       const bool copy_ivd = _msk->get_bool(F_IVD);
       if (copy_pcon || copy_causali || copy_clifo || copy_ivd) 
       {
-        if (prefhndl->exist(to_firm))
+        if (prefix().exist(to_firm))
         {
           set_firm(to_firm);
           TLocalisamfile mov(LF_MOV);
diff --git a/cg/cg4300.cpp b/cg/cg4300.cpp
index 09dbcdc6d..9d6537805 100755
--- a/cg/cg4300.cpp
+++ b/cg/cg4300.cpp
@@ -436,7 +436,7 @@ void TLiquidazione_app::build_nomiditte(TProgind* pnd)
   for (dt.first(); !dt.eof(); dt.next())
   {     
     // check no archivi
-    bool good = prefhndl->exist(dt.get_long("CODDITTA"));                        
+    bool good = prefix().exist(dt.get_long("CODDITTA"));                        
     
     if (good) 
     {   
diff --git a/cg/cg4400.cpp b/cg/cg4400.cpp
index 5ca7a78ec..f1d0b50f2 100755
--- a/cg/cg4400.cpp
+++ b/cg/cg4400.cpp
@@ -288,7 +288,7 @@ bool CG4400_application::mask_libun (TMask_field& f, KEY k)
     for (int i = 0; i < app()._ditte->items(); i++)
     {
       long ditta = app()._ditte->row(i).get_long(1);
-      if (prefhndl->exist(ditta))
+      if (prefix().exist(ditta))
       {
         app().set_firm(ditta);   
         if (cod.not_empty())
@@ -625,7 +625,7 @@ void CG4400_application::build_nomiditte(TProgind* pnd)
   for (dt.first(); !dt.eof(); dt.next())
   {     
     // check no archivi
-    bool good = prefhndl->exist(dt.get_long("CODDITTA"));                        
+    bool good = prefix().exist(dt.get_long("CODDITTA"));                        
     if (good) 
     {   
       // check no parametri liquidazione