Here’s the reload image definition. I couldnt upload it there:
The reload image node will take an input of a file path and it will split it into separate components to extract the image name only because then we can use the image name to extract an imported element type and then simply reload it. Keep in mind that if you run the import image node multiple times, each time it will insert a new image into the model. Go to Manage Images dialog box in revit to see the new instances. They will keep getting a (1), (2), (3) etc appended to their name. Make sure that you don;t create multiple instances of the image, because only the first one will match the original file name and thus reload properly. All other ones will not. Good luck!