to submit the new version of my application, i had to add screenshot in 5,5 inches, 4,7 inches and 12,9 inches.
according to the "iTunes Connect Developer Guide=> Screenshot properties" the following resolution are allowed to be upload on the appstore
Screenshot requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
Any of the following sizes:
640 x 920 pixels for hi-res portrait (without status bar) minimum
640 x 960 pixels for hi-res portrait (full screen) maximum
960 x 600 pixels for hi-res landscape (without status bar) minimum
960 x 640 pixels for hi-res landscape (full screen) maximum
But each time i want to upload a screenshot i got the following message: Les dimensions d’une ou plusieurs captures d’écran sont incorrectes. En savoir plu
without any additional advice.
Is there any other restriction on the format file to be approved by itunesconnect??
My picture is 640x960 72dpi rgb in jpeg format. I don't know what to do and how i can upload my screenshot to upgrade my app... Thanks for your help

