I too am having the same problem. It does not work. According to this SAS presentation, it should work: http://www.knoware.co.nz/wp-content/uploads/2015/11/SAS-VA-presentation-to-Knoware-User-Group-Read-Only.pdf

The VA version I am working on is 7.3 with the Classic viewer layout enabled (or Modern viewer disabled). I wonder if the passing of parameters only works using Modern viewer?

/Daniel