Just a quick update, spotted a whole load of these errors in catalog status. Not seen this problem before...
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_018.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_019.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_021.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_022.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_023.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260620_Stock_343.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260720_Stock_045.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260720_Stock_046.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_260720_Stock_047.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}
[Mon 16:48:14] {"cmd"=>"proxy_gen", "file"=>"/Volumes/LIBRARY/Dropbox/Pictures/Stock/Sent/COVID/MH_270320_Stock_100.JPG", "msg"=>"image_resize: RuntimeError/bitmap_load_scaled: NRFError: 5"}