On the dev box Craig, hitting Ctrl-f5 starts the app OK but if I then click on a link to navigate to another page Boom, the error has started to vary now as I'm trying various fixes, the @model does not exist error is only shown in Design mode, the runtime ones can be

IEnumerable <Mytable> does not contain a definition for <name of field>

or System.Web.WebPages does not contain a namespace Helpers are you missing a reference - it's driving me nuts - please don't sweat on it too much though as this is all part of my learning not a payer. Thanks very much to both of you for helping ( Hello Viv )