I updated my code with this codeType to update the pictures in Ebay:
PictureDetailsType ebaypicture = new PictureDetailsType(); ebaypicture.GalleryType = GalleryTypeCodeType.Gallery; ebaypicture.PhotoDisplay = PhotoDisplayCodeType.None; ebaypicture.PictureURL = new StringCollection(); string picturePath = ebayarticle.PicturePath.Replace(" ", "%20"); ebaypicture.PictureURL.Add(picturePath); updateItem.PictureDetails = ebaypicture; GetEbayApiContext(applicationkey, languagekey); ReviseItemCall rvICall = new ReviseItemCall(APIContext); rvICall.Timeout = 120000; I have tested it with a Picture with 500px x 500px, but ebay says also Error 21919137: "Buyers love large photos that clearly show the item, so please upload high-resolution photos that are at least 500 pixels on the longest side. But I revise only the Sellerquantity.".
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