RDLC report definition not specified

[Guest]

I created a new report using the ReportViewer control and get this error
message when trying to display it:

An error occurred during local report processing.
The report definition for report 'PSTS.reports.Tester.rdlc' has not been
specified

I don't understand where the report definition needs to be specified. Isn't
the .rdlc file the specification?

Thanks
/Ken