diff --git a/EgtGeneral.rc b/EgtGeneral.rc
index 6eb42a2..6620d97 100644
Binary files a/EgtGeneral.rc and b/EgtGeneral.rc differ
diff --git a/StringUtils.cpp b/StringUtils.cpp
index ae89d97..cbaea53 100644
--- a/StringUtils.cpp
+++ b/StringUtils.cpp
@@ -101,7 +101,7 @@ FromString( const string& sVal, STRVECTOR& vsVal)
 
 //----------------------------------------------------------------------------
 const string
-ToString( double dVal, int nPrec)
+ToString( double dVal, int nPrec, int* pnErr)
 {
    const double BIG_NUMBER = 1e10 ;
    const int    BIG_DIGITNBR = 10 ;
@@ -124,12 +124,17 @@ ToString( double dVal, int nPrec)
       _ASSERT( 0) ;
       string sErr = "ToString Error : " + ToString( nErr) ;
       LOG_ERROR( GetEGnLogger(), sErr.c_str())
+      if ( pnErr != nullptr)
+         *pnErr = nErr ;
       return "#Error" ;
    }
 
   // se buffer vuoto, risultato è numero 0
-   if ( szBuff[0] == '\0')
+   if ( szBuff[0] == '\0') {
+      if ( pnErr != nullptr)
+         *pnErr = nErr ;
       return "0" ;
+   }
 
   // verifica per forma esponenziale
    int nExp ;
@@ -167,6 +172,7 @@ ToString( double dVal, int nPrec)
          _ASSERT( 0) ;
          string sErr = "ToString Error : " + string( szBuff) ;
          LOG_ERROR( GetEGnLogger(), sErr.c_str())
+         nErr = 999 ;
       }
       if ( nDecimal == 0) {
          *pDest = '.' ;
@@ -210,6 +216,9 @@ ToString( double dVal, int nPrec)
       *pDest = '\0' ;
    }
 
+   if ( pnErr != nullptr)
+      *pnErr = nErr ;
+
    if ( szDest[0] == '-'  &&  szDest[1] == '0'  &&  szDest[2] == '\0')
       return "0" ;
    else