"The definition of the report 'XYZ' is invalid."

Ever run into the SSRS Report Builder error The definition of the report 'XYZ' is invalid.?

Ever been really annoyed by how useless and unhelpful that error is?

Well, there's a simple way to get the Report Builder to cough up some more details about the error.

Just click on the Preview pane for the report and it'll show you the exact error message which, while opaque, is at least something you have a chance of Googling.

Why the Report Builder won't give you the detailed error in the Error List is beyond me.