Hello again :-),
I have from time to time a problem using the Image Plugin: It seems to cache Images to the Temp folder, that is whiped out by the system. Somewhere in the wild these files seem to be interpreted as forever available, while they are not.
This results in Messages like:
ERROR DL Python Network Learner 0:84 Execute failed: java.io.FileNotFoundException: C:\Users\Richard\AppData\Local\Temp\knime_fs-Image_Converter-94090\000\000\3d3b0846-d51d-431b-b6f9-f807d84ecfd9 (Das System kann die angegebene Datei nicht finden)
I cannot reproduce this in a simple workflow. But I guess something like: Loading images → Process them → Store workflow → Close Workflow → Delete Temp → reload workflow will do the trick.
The ImageViewer Nodes however dont seem to be affected by that behaviour. Even when receiving that error, I can scroll through the images.