grazie, ho provato ad omettere ASC dalla query e non cambia niente, sempre lo stesso errore...
Può essere in mconn il problema?
mconn = Provider=Microsoft.Jet.OLEDB.4.0;Password="";User ID=Admin;Data Source=E:\Ged Doc\INFR.2005.004\dati\Esercizi\Anno2003\cd05\DOC_ CD\DATABASE\;Mode=Share Deny None;Extended Properties="DBASE IV;";Jet OLEDB:System database="";Jet OLEDB:Registry Path="";Jet OLEDBatabase Password="";Jet OLEDB:Engine Type=17;Jet OLEDBatabase Locking Mode=0;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password="";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDBon't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False

Non so più cosa provare!!!