I believe this is more OSX than Xojo related. In my software I print data together with lightweight graphics. For example I print 5 sites together to a pdf file with a complete weight of 41 KB.
The pdf is created within the OSX print dialog - Open pdf in preview. Sometimes there comes a dilaog that says: the file could not be opened, because it does not exist. Then by closing this message window the pdf file with the data is shown.
Can I prevent this message dialog to appear?