title: How to use stored proc with null parameters in SSRS?
body: <p>i have a report that uses a stored procedure that is using optional parameters.I have 4 optional parameter,so in the report's preview tab ,i can 4 textboxes for the parameters.But when i dont write anything in the textboxes,i get an error..What can i do to execute my proc with null parameters is SSRS ?</p>