diff --git a/include/alleg.h b/include/alleg.h
index 4aa9c406b..1ae134bc4 100755
--- a/include/alleg.h
+++ b/include/alleg.h
@@ -3,9 +3,8 @@
 
 #define DEFFLD(fldname) const char* const ALL_##fldname = #fldname;
 
-// Key 1 = ANNO+CODATT+PROGR
+// Key 1 = ANNO+PROGR
 DEFFLD(ANNO)
-DEFFLD(CODATT)
 DEFFLD(PROGR)
 
 // Key 2 = TIPOCF+CODCF+OCFPI+PROGR
diff --git a/include/execp.cpp b/include/execp.cpp
index 30e63c11d..993cd5262 100755
--- a/include/execp.cpp
+++ b/include/execp.cpp
@@ -42,7 +42,7 @@ long TExternal_app::run(
     params = ps;
   if (params > 0)
     comm_name.cut(params); 
-	if (*comm_name.ext() == '\0')	//se non c'e' estensione ci mette .exe (sono programmi)
+	if (*comm_name.ext() == '\0')	// se non c'e' estensione ci mette .exe (sono programmi)
     comm_name.ext("exe");
 
 	const bool found = comm_name.custom_path();	//cerca il file in custom o in locale
@@ -52,7 +52,8 @@ long TExternal_app::run(
     bool our_app = name.len() > 2;
     if (our_app && atoi(name) < 70)
     {
-      our_app = isalpha(name[0]) && isalpha(name[1]) && isdigit(name[2]);
+      our_app = (isalpha(name[0]) && isalpha(name[1])) && 
+                (isdigit(name[2]) || name.ends_with("cnv"));
     }
     if (!our_app)  // Non e' un programma di campo per cui ...
       utente = 0;  // ... non aggiungo il codice utente al comando
@@ -65,7 +66,7 @@ long TExternal_app::run(
       path << _path.mid(params);
   }
 
-  if (utente)
+  if (utente && path.find(" /u") < 0)
     path << " /u" << user();
   
   // save cwd
diff --git a/include/isam.cpp b/include/isam.cpp
index bb9cc512b..b15a8092e 100755
--- a/include/isam.cpp
+++ b/include/isam.cpp
@@ -3618,30 +3618,29 @@ bool TRectype::get_bool(const char* fieldname) const
 
 TDate TRectype::get_date(const char* fieldname) const
 {
-  TDate d(get_str(fieldname));
+  const TDate d(get_str(fieldname));
   return d;
 }
 
 void TRectype::put(const char* fieldname, int val)
 {           
-	TString16 tmp;
-  tmp.format("%d", val);
+	char tmp[16];
+  itoa(val, tmp, 10);
   put_str(fieldname, tmp);
 }
 
 
 void TRectype::put(const char* fieldname, long val)
 {
-	TString16 tmp;
-  tmp.format("%ld", val);
+	char tmp[16];
+  ltoa(val, tmp, 10);
   put_str(fieldname, tmp);
 }
 
 
 void TRectype::put(const char* fieldname, word val)
 {
-	TString16 tmp; tmp.format("%u", val);
-  put_str( fieldname, tmp);
+  put(fieldname, (int)val);
 }
 
 void TRectype::put(const char* fieldname, const real& val)
@@ -3656,7 +3655,6 @@ void TRectype::put(const char* fieldname, const TCurrency& val)
 
 void TRectype::put(const char* fieldname, const TDate& val)
 {            
-  //  put_str( fieldname, val.string(full));
   put( fieldname, val.date2ansi());
 }
 
@@ -3669,7 +3667,7 @@ void TRectype::put(const char* fieldname, char val)
 
 void TRectype::put(const char* fieldname, bool val)
 {
-  put( fieldname, val ? 'X' : ' ');
+  put(fieldname, val ? 'X' : ' ');
 }
 
 
diff --git a/include/mask.h b/include/mask.h
index 021b580d8..8f7a197ac 100755
--- a/include/mask.h
+++ b/include/mask.h
@@ -376,10 +376,10 @@ public:
   // @cmember Azzera il campo
   void reset(const char * fld_id) {set(fld_id, "");}
 
-  // @cmember Legge, dalla relazione <p Trelation>, i valori del campo con specifica FIELD
-  void autoload(const TRelation& r);
-  // @cmember Scrive, dalla relazione <p Trelation>, i valori del campo con specifica FIELD
-  void autosave(TRelation& r) const;
+  // @cmember Legge, dalla relazione <p TRelation>, i valori del campo con specifica FIELD
+  virtual void autoload(const TRelation& r);
+  // @cmember Scrive, dalla relazione <p TRelation>, i valori del campo con specifica FIELD
+  virtual void autosave(TRelation& r) const;
 
   // @cmember Permette di mandare un tasto ad un campo
   void send_key(KEY key, short id, TMask_field* from = NULL);
diff --git a/include/strings.cpp b/include/strings.cpp
index f48e861b6..8952ef3d9 100755
--- a/include/strings.cpp
+++ b/include/strings.cpp
@@ -24,7 +24,7 @@ const TToken_string& empty_string()
 
 // Most descriptions will fit in fifty characters
 const int DEFAULT_SIZE = 50;
-const int MAX_SIZE = 32000;
+const int MAX_SIZE = 65535;
 
 inline bool is_space(char c)
 { return c >= '\t' && c <= ' '; }
@@ -97,7 +97,7 @@ int TString::make_room(
     if (new_size > MAX_SIZE)
       new_size = MAX_SIZE;
     if (new_size < min_size)
-      fatal_box("Stringa di lunghezza eccessiva (%ld)", min_size);
+      fatal_box("Stringa di lunghezza eccessiva (%d)", min_size);
     resize(int(new_size), true);
   }
   return lun;
@@ -149,7 +149,6 @@ char TString::shift(int n)
   return r;
 }
 
-
 TString& TString::operator <<(const char* s)
 {
   if (s && *s)
@@ -171,23 +170,20 @@ TString& TString::operator <<(char c)
 
 TString& TString::operator <<(int n)
 {                          
-  char s[16];
-  sprintf(s, "%d", n);
+  char s[16]; _itoa(n, s, 10);
   return operator <<(s);
 }
 
 
 TString& TString::operator <<(long n)
 {
-  char s[16];
-  sprintf(s, "%ld", n);
+  char s[16]; _ltoa(n, s, 10);
   return operator <<(s);
 }
 
 TString& TString::operator <<(double n)
 {
-  char s[32];
-  sprintf(s, "%lg", n);
+  char s[32]; sprintf(s, "%lg", n);
   return operator <<(s);
 }
 
@@ -245,7 +241,6 @@ bool TString::full() const
 
 }
 
-
 TString& TString::strip_spaces()
 {
   char instring = '\0';
@@ -1826,7 +1821,7 @@ int TToken_string::get_pos(const char* s)
 // Certified 80%
 int TToken_string::get_pos(long n)
 {
-  char s[16]; sprintf(s, "%ld", n);
+  char s[16]; _ltoa(n, s, 10);
   return get_pos(s);
 }
 
@@ -1894,8 +1889,7 @@ void TToken_string::add(char c, int pos)
 // Certified 100%
 void TToken_string::add(long n, int pos)
 {
-  char s[16];
-  sprintf(s, "%ld", n);
+  char s[16]; _ltoa(n, s, 10);
   add(s, pos);
 }
 
@@ -1903,8 +1897,7 @@ void TToken_string::add(long n, int pos)
 // Certified 100%
 void TToken_string::add(int n, int pos)
 {
-  char s[16];
-  sprintf(s, "%d", n);
+  char s[16]; _itoa(n, s, 10);
   add(s, pos);
 }
 
@@ -2010,7 +2003,7 @@ TAuto_token_string& TAuto_token_string::create(const char* ts)
 ///////////////////////////////////////////////////////////
 
 TParagraph_string::TParagraph_string(const char* s, int width)
-: TToken_string(s, '|'), _width(width)
+                 : TToken_string(s, '|'), _width(width)
 { tokenize(); }
 
 const TString& TParagraph_string::operator =(const char* s)
@@ -2075,7 +2068,8 @@ int TString_array::add(const char* s, int n)
 {
   if (objptr(n) == NULL) 
     n = TArray::add(new TToken_string(s), n);
-  else row(n) = s;
+  else 
+    row(n) = s;
   return n;
 }