--- oup/current/DataAccess/Access_OniArchive.pas	2007/11/26 11:02:28	248
+++ oup/current/DataAccess/Access_OniArchive.pas	2007/12/16 14:44:16	252
@@ -71,7 +71,7 @@ begin
     Exit;
   end;
   FFileName := DatFilename;
-  Fdat_file := TFileStream.Create(FFileName, fmOpenRead);
+  Fdat_file := TFileStream.Create(FFileName, fmOpenReadWrite);
   Fdat_file.Read(Fdat_header, SizeOf(Fdat_header));
   header_pc  := True;
   header_mac := True;