diff --git a/fe/felib.cpp b/fe/felib.cpp
index 0266837a6..9f20546db 100644
--- a/fe/felib.cpp
+++ b/fe/felib.cpp
@@ -707,6 +707,7 @@ TObject* TCofi_cache::find_ragsoc(bool piva, char tipocf, const TString& code)
   TISAM_recordset occas(query);
   if (occas.move_first())
     return new TString80(occas.get(OCC_RAGSOC).as_string());
+  
   return NULL;
 }
 
@@ -734,25 +735,37 @@ TObject* TCofi_cache::key2obj(const char* key)
 
 const TString& TCofi_cache::cofi2ragsoc(char tipocf, const TString& cofi) 
 { 
-  const TString* ragsoc = &EMPTY_STRING;
+  const TString* ragsoc = NULL;
   if (cofi.full())
   {
     TString80 key;
     key.format("CF|%c|%s", tipocf, (const char*)cofi);
     ragsoc = (const TString*)objptr(key); 
   }
+  if (ragsoc == NULL)
+  {
+    TString& str = get_tmp_string();
+    str << TR("C.F. sconosciuto ") << cofi;
+    ragsoc = &str;
+  }
   return *ragsoc;
 }
 
 const TString& TCofi_cache::paiv2ragsoc(char tipocf, const TString& paiv) 
 { 
-  const TString* ragsoc = &EMPTY_STRING;
+  const TString* ragsoc = NULL;
   if (paiv.full())
   {
     TString80 key;
     key.format("PI|%c|%s", tipocf, (const char*)paiv);
     ragsoc = (const TString*)objptr(key); 
   }
+  if (ragsoc == NULL)
+  {
+    TString& str = get_tmp_string();
+    str << TR("P.I. sconosciuta ") << paiv;
+    ragsoc = &str;
+  }
   return *ragsoc;
 }