Debugging a KNIME workflow run on a command line

[mlauber71]

Have you tried the

-consoleLog

option. And is there a reason why you do not reset the workflow at the start?

https://www.knime.com/faq#q12

Then you could try and give a location for a log file

Batch Mode: Logs

You can use "-data <some-folder>" and it will put the knime.log file there. Stdout can be redirected via "> /folder/some-file.txt". Standard bash or  windows batch redirect... (so error redirect works, too). Best, Iris 

Then you could try and also give a workflow directory (not sure if this will help)

knime batch file execution

I was able to write a batch file to write the Excel file to my Desktop. “C:\Program Files\KNIME\knime.exe” -nosave -consoleLog -noexit -nosplash -reset -application org.knime.product.KNIME_BATCH_APPLICATION -workflowDir=“C:\default_workflow_directory_here\forum_batch_test” Give that a try, replacing your knime.exe location and your workflow directory location.

Then there is this hint by @ipazin how to modify log setting in the inner workings of knime or set a configuration file.

Executing Workflow as a Batch Application - Log Level Settings

Hi there! Setting console log level in UI doesn’t affect logging on the command line. The only way to change the logging on the command line is by either modifying /.metadata/knime/log4j3.xml or by creating a custom log configuration file and setting that with a command line parameter. Br, Ivan

And finally there is this article elaboration on batch execution. Maybe this gives further ideas.

Processing Large Datasets With KNIME

The error message sounds like there could be a problem with the settings of logging in general. So maybe explicitly telling the system what to do with logs could help.