SSRS Report Parameter Default Null Value not Applied

Question

I have a SSRS report with a single integer parameter.

Using Report Builder I've:

• changed the parameter to allow null values.
• set the default value to Null.
• saved the report.

However, when the report is requested from the server, the parameter is empty (rather than Null) and the Null checkbox isn't ticked.

Answer 1

Even though the report was being saved with the change, this wasn't being observed when it was rendered and returned by the server.

I had to use 'Save As' to save the report as a different name to get the change to apply. I could then delete the original report and rename the revised report to that of the original.