I was able to do it with a shapefile without any issue but am having trouble figuring out how and where to specify the parameters for the GEODATABASE_SDE format.
I am using an SDE connection file if that makes it any easier. However, whenever I try to open() the reader it pops up the SDE connection properties dialog. I get the feeling I'm just not specifying the reader parameters/directives correctly, but without finding any examples of the proper format I can only guess.
Thanks!