diff --git a/include/isam.cpp b/include/isam.cpp
index d4eeb6abc..059860988 100755
--- a/include/isam.cpp
+++ b/include/isam.cpp
@@ -2110,23 +2110,29 @@ int TSystemisamfile::update(
       }
     }
 
-		const int wfields = wrec.fields();
-		int newfields = wfields;
-		TToken_string def;
+		const int oldfields = oldrec.fields();	//numero campi del vecchio file
+		const int wfields = wrec.fields();			//numero campi del nuovo file
+		int newfields = wfields;								//numero campi del nuovo file compresi quelli personalizzati (_)
+		TToken_string def;											//riga del file .trr nome|tipo|lungh|dec
 
    	const int oldfields = oldrec.fields();
 		for (int j = 0; j < oldfields; j++)
     {
 			def = oldrec.fielddef(j);
-			if (!interactive && (def.get(0)[0] == '_'))
+			const TString16 fname = def.get(0);		//nome e basta del campo
+			if (!interactive && fname[0] == '_')
 			{
-        if (newrec.field(def) == FIELDERR)
+	      if (wrec.field(fname) == FIELDERR)
         {
 				  if (newfields < MaxFields)
+					{
 					  wrec.update_fielddef(newfields++, def);
+	        	wrec.set_fields(newfields);
+			      wrec.rehash();
+					}
 				  else
-					  if(!yesno_box(FR("Il campo %s non verra' preservato, continuare"),
-							     	  	  (const char *) def.get(0)))
+						if(!yesno_box("Il campo %s non verra' preservato, devo continuare?",
+								     	  	(const char*)fname))
 						  return NOERR;
         }
 
diff --git a/include/reprint.cpp b/include/reprint.cpp
index 98c0db235..2d387f32f 100755
--- a/include/reprint.cpp
+++ b/include/reprint.cpp
@@ -1853,7 +1853,7 @@ bool TBook::main_loop()
     _pageto = pages();
 
   _print_aborted = false;
-  for (word copy = 1; copy < _copies && !_print_aborted; copy++)
+  for (word copy = 0; copy < _copies && !_print_aborted; copy++)
   {
     for (size_t page = _pagefrom; page <= _pageto && !_print_aborted; page++)
     {
diff --git a/include/variant.cpp b/include/variant.cpp
index a8c165e72..123a1b0fe 100755
--- a/include/variant.cpp
+++ b/include/variant.cpp
@@ -119,10 +119,20 @@ long TVariant::as_int() const
 bool TVariant::as_bool() const
 {
   bool ok = false;
-  if (_type == _alfafld)
-    ok = strchr("1VXY", as_string()[0]) != NULL;
-  else
+  switch (_type)
+  {
+  case _nullfld:
+    break;
+  case _alfafld:
+    {
+      const TString& str = as_string();
+      ok = str.full() && strchr("1TVXY", str[0]) != NULL;
+    }
+    break;
+  default:
     ok = as_int() != 0;
+    break;
+  }
   return ok;
 }