Hi, Manston13, I've never seen this problem before, but another Support staff member may have. Can we start by rebooting your machine? The problem bears a resemblance to Greymagic errors that are worked-around by rebooting. cheers, chinajade
If i remember correctly, it's a Microsoft error.. i'll try and find a link @CJ, FIX: System.ArgumentOutOfRangeException occurs intermittently with ADO.NET ? Try and do a clean install of HB, that might solve it ^^