I have set the resource up as a "Force Download" so IE shouldn't be trying to open it. Normally the open/save/cancel dialogue comes up. But with this file the process breaks before the dialogue is displayed.
All I need the students to be able to do is to download an save the file onto their own computer, from which they can open it up using Microsoft Office OneNote from the MS Office 2010 program. Currently they can do this by accessing the file from the school's intranet. Unfortunately this is unavailable from outside school so we are setting this up in moodle so they can access the resource via the internet.
The file is a Microsoft OneNote Section with a .one extension.
I have also created quite small files of the same type and created a force download file resource with those and they worked fine.
This is seriously puzzling.
Here is a screenshot of the error.