The report definition is not valid

Question

I have converted an .rdlc rerort from SSRS 2005 to SSRS 2008. Now when I am going to build that project I have got error.

The report defi

Answer 1

I faced an almost similar problem but in another version of visual studio ( 2012) and i found out that the problem was from the version of Microsoft.ReportViewer.WebForms.dll or winforms. You may be still referencing the old one related to your current version of visual studio so check the dll version and if so remove it and add the latest one