[Gretl-devel] bundle-print function in a GUI package

Hi, I'm trying to extend a package with a bundle-print function (as defined/explained in the package guide) which works on the bundle returned from the gui-main function. However, I'm not getting any printout in the output window -- but the bundle elements show up OK via the button in that window. Is there a complete package that uses bundle-print successfully, and preferably which isn't an add-on like gig etc.? So that I can compare and spot my mistake. thanks, sven