SSRS the definition of the report is invalid
I just received this obscure message when trying to deploy a report from BIDS.
After a little hunting I found a more descriptive error by going into the Preview window.
I found the problem to this... due to a incorrect/failed reference in .rdl to data conns etc. Also found that BIDS wasn't happy about having spaces in some of the project/report filenames... so anyone facing this issue make sure you have no spaces in your naming and check your rdl files, connections, everything for failed/out of date references! Visual Studio seems crap at keeping all of it's references up to date... god forbid you have to rename anything!
I had simply changed the capitalization of ONE character in one of my report parameters and could no longer deploy. Changing the single character back to uppercase allowed me to redeploy.Remarkable.