Hi @niederle @stoeter @gmakara -
I’ve found that nodes in loops are leaking one image per execution of the workflow (not execution of the node within the loop, but rather, basically, each time the loop is started and stopped, regardless of how many loops are run during that time.) It is plausible that, cumulatively, a long running application, having run workflows with many loops in them, may eventually exhaust SWT handles on Windows due to this leak (i.e this is the only lead i have so i’m correcting what i can.)
I have made a 3.7.1 patch jar with the fix that addresses this. Please get the patched workflow editor plugin jar from here:
http://theori.st/take_away/knime/11342/editor.jar
(or http://theori.st/take_away/knime/11342/editor.jar.zip if you have supervising software that doesn’t like JAR files to be downloaded).
Then, make sure KNIME is quit; using Explorer, find your knime_3.7.1\plugins\org.knime.workbench.editor_3.7.1.v201901281154 directory. In that directory, rename the existing editor.jar (like editor_jar.bak) so that you still have it around if you want to revert. Then copy the downloaded editor.jar into this directory and run KNIME.
Please report back whether you still experience freezes if you use the patch jar - thanks.