I've been researching this for hours and so far I can't find the answer!
I am modifying a sub report of an existing report in Visual Studio 2005. I added a report parameter for the sub report. There is already a report parameter in place. It corresponds with an ID field that is used to populate data with the other datasets. The user fills this ID in, the data sets populate and the report should generate.
The second parameter I have added has these properties:
2. Allow blank value
3. Available values: from query. I specified the value and label.
4. Default values: Null
Whenever I try to preview the report I have the error message: "The <my parameter> is missing a value." The report never shows any data. For the life of my I can't figure out what is causing this error message. I sure wish I had some clue what it is missing. Does anyone have an idea how to resolve this?