Im trying to export a SharePoint-List(created from a custom Listdefinition) to Excel by using the "Export to Excel"-button on the ribbon. It works when im trying with other default SharePoint-lists like "Tasks" but not with my three lists created from unique listdefinitions.
The error im presented with is “An unexpected error has occurred. Changes to your data cannot be saved”.
The list has less than 50 items so it should not matter.
I have tried from different computers, changing permissions on the list for the user. Im using Sharepoint 2010 and Office pro x64 Excel.
Would really appreciate someone nudging me in the right direction.