ActionAsPdf - BuildFile does not call controller method

[jtsom]

I have code that creates an ActionAsPdf object, pointing to a method in an controller. The method is marked as [AllowAnonymous] so permissions is not an issue. There are two almost identical calls to two different methods. One works just fine and generates the PDF, but the second just generates a blank page, never actually calling the controller method to build the partial view.

I've compared both methods and except for parameters, they are called the same. I can call the "not working" method from the browser and it works just fine.

I'm at a loss as to why this isn't working. Some error messages or exceptions would be helpful.