I'm having a very strange issue that I've never experienced in any development environment. Ever.
I am using Visual Studio 2019, Version 16.104.4 / Microsoft SQL Server Reporting Services Designers
Version 15.0.19528.0
I have a RDL file that was provided me. I can create the SharedDataSource, import the RDL (and redirect the DataSet to look at the new SharedDataSource), and Preview this "new" (to me) report no problem at all! It works nicely.
THEN - the SSRS Solution is saved. When you reopen it to run the report again (or work on it, whatever), I get an error when I try to Preview It:
"An error occurred during the local report processing.
Error in the application.
Object reference not set to an instance of an object."
It seems like the dataset somehow loses the connection to the SharedDataSource, but that's only a weak hypothesis.
Does anyone have any clue what is happening here?
Your help appreciated.
Thank you.
s