After this, in the next run both stop at 40% progress (Generating Image) and do not work any more.
I have to Stop KNIME and kill the remaining process in the task manager.
Then I restart KNIME and it is possible to run the workflow again, for one time.
This does not happen if a do not create the image, but I need the image in a report.
I use KNIME 4.5.1
What should I do?