When creating a new in app purchase with Application Loader, I can't seem to deliver my package, or save the ApplicationLoader configuration (.ITMSP) file.
I seem to get the following message:
The document X could not be saved as Y.itsmp. The file doesn’t exist.
Of course it doesn't exist - I'm creating it!
This one confused me for a while too.
Click the title bar and type a name in, press enter, save, job done.
As blogged here: http://bit.ly/1FS3TcT