Hi olly and thanks for the reply. Like I said, the only thing that happens is that the Build log tab in the Logs and others area switches to the active tab. The Build log tab is empty when it does this. Messing around with it a bit more I noticed that when I try to run it, it says in a dialog box, "It seems that this file has not been built yet. Do you want to build it now?" Options are Yes, No and cancel. If I click yes, nothing happens, the dialog box just disappears. If I click no, I get a dos window which says, "Process returned 0 (0x0) execution time : 0.000 s Press any key to continue."