SSRS the definition of the report is invalid

Question

How can I resolve the below error message that I receive when I try to deploy my report to our our Reporting Server using BIDS?

Mes

Answer 1

The report definition is not valid or supported by this version of Reporting Services. This could be the result of publishing a report definition of a later version of Reporting Services, or that the report definition contains XML that is not well-formed or the XML is not valid based on the Report Definition schema.

I got this error when I used ReportSync to upload some .rdl files to SQL Server Report Services. In my case, the issue was that these .rdl files had some Text Box containing characters like ©, — (Em dash), – (En dash) characters, etc. When uploading .rdl files using ReportSync, I had to encode these characters (©, —, –, etc.) and use Placeholder Properties to set the Markup type to HTML in order to get rid of this error.

I wouldn't get this error If I manually uploaded each of the .rdl files one-by-one using SQL Server Reporting Services. But I have a lot of .rdl files and uploading each one individually would be time-consuming, which is why I use ReportSync to mass upload all .rdl files.

Sorry, if my answer doesn't seem relevant, but I hope this helps anyone else getting this error message when dealing with SSRS .rdl files.