Using Report Builder 3.0, SharePoint Integrated Mode and SQL Server 2008R2.
On creating a new report in Report Builder, I kept getting the error:
‘Failed to preview the report. The Item XXX can not be found’.
XXX being a meaningless GUID.
Turns out, the Report needed to be saved to a SharePoint library for the preview to render.
Lean something new every day:
The Fix, thank you Technet:
Save to a SharePoint Library!