This is in SSRS 2012
I'm having problems trying to make a cascading parameter optional. The report requirements are that the user can enter an employee ID and run the report, or enter part/all of the last name to get a drop down list of employees to select from.
Right now I can't get it configured so an ID can be entered and then hit view report. When I do that it throws an error requesting a value be entered for the 'Select Employee From List'.
The Employee parameter (which is behind the 'Select employee from list') is setup to get it's values from a query. The query gets name and ID values based upon the string entered in the 'last name contains'. I have tried setting up the Employee parameter to allow NULL and/or blank values. I have tried setting up a default value for the parameter. When I put in a default for the parameter, I still had to actually select the default in order for it to work.
I also tried setting the 'Last Name Contains' variable so that it can be NULL and checked the NULL which did not change anything.
What am I missing?