diff --git a/at/at6300.cpp b/at/at6300.cpp
index 5efc60862..2c576ad09 100755
--- a/at/at6300.cpp
+++ b/at/at6300.cpp
@@ -607,9 +607,9 @@ bool TControlloDonazioni::user_create()
 
 bool TControlloDonazioni::user_destroy()
 {
+  delete _contsan;
   delete _msk;
   delete _rel;
-  delete _contsan;
   return TRUE;
 }
 
diff --git a/at/at6300a.uml b/at/at6300a.uml
index 8952a8ffd..366e34c9a 100755
--- a/at/at6300a.uml
+++ b/at/at6300a.uml
@@ -125,11 +125,15 @@ END
 DATA F_DATAINI
 BEGIN
    PROMPT 2 6 "Donazioni dal   "
+   CHECKTYPE REQUIRED
+   WARNING "Inserire la data iniziale"
 END
 
 DATA F_DATAFIN
 BEGIN
    PROMPT 30 6 "al "
+   CHECKTYPE REQUIRED
+   WARNING "Inserire la data finale"
 END
 
 STRING F_TIPODON 2