Server connect download with dynamic parameter not work

[famousmag]

I havent done it but just trying to help (and learn at the same time)...

From what I read it is better to assign the link via the routing button:

And there you should assign the iddoc param there:

An explenation from Patrick that I think is related...

Problem with Server Action Download File

You specified a route with the path api/dwnldReport/:filename. To access the parameter :filename from the path you need to use $_PARAM.filename. Lets say the url is api/dwnldReport/myfile?filename=report.pdf, then the variables can be accessed as: $_PARAM.filename = 'myfile' $_GET.filename = 'report.pdf' $_PARAM gets the route path parameter and $_GET will get the parameter from the querystring.