Exporting to the SGI format fails
See https://www.reddit.com/r/GIMP/comments/8qbdci/exporting_a_png_file_as_an_rgb_file_results_in/ - it just fails, and seems to be unrelated to any aspect of the image or option chosen in the export dialog.
See https://www.reddit.com/r/GIMP/comments/8qbdci/exporting_a_png_file_as_an_rgb_file_results_in/ - it just fails, and seems to be unrelated to any aspect of the image or option chosen in the export dialog.