Paramter is missing a value in SSRS

Question

I'm calling a Detail report from the summary report and my summary report field is passed as a parameter to the detail report. However when clicking on certain rows based on one condition, the detail report opens correctly. Certain rows shows the type parameter is missing.

I am passing the type value while invoking the reports and value is passed from the type field in the summary report

Eg IF(@type=''A'')
EXEC AcceptedDetail
If (@type = ''R'')
EXEC AcceptedDetail

In this case R works fine while A does not.

Answer 1

Try

DECLARE @type CHAR(1) = 'R'

IF @type IN ('A','R')
BEGIN
   EXEC AcceptedDetail
END