I have added a simple button set to 'Launch' a Providex application from an existing QVW. The launch command line includes the application, starting file name and parameters. If I populate each of these button properties the parameters never get to the Providex session. . In order to get the parameters to work I need to enter them along with the filename in the 'Filename;" property. This would suffice as I am not one to argue with success but when I close and re-open the qvw the information I entered as the 'Filename' launch property is gone. I saved the QVW after making the change. I tried this a number of times. It just looks like Qlikview is not saving the entered information. Has this behavior already been reported and corrected in 9.0?