Hello,
I want to add a URL link to my menu to start a process, however I want to pass the process some default values for some of the workflow variables. I understand that the way to do this is to append 'var_<variable_name>=<variable_value>' to the end of my URL. However when I do this and try to load the variable in a form using the hash variable #variable.<variable_name># instead of seeing the value I passed in my URL I see this (the field Service Catalog Item is what I tried to pass using a URL parameter): 
Any idea why this is happening, and why passing data to the workflow variables via URL parameters is not working?
Thanks!