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Call Try Catch - Main

<p>You can try to identify a failure in a subworkflow and trigger a case when in the main one<br></p><p>two ways to communicate data with the sub-workflow: just send the data there or save a data file and send the path to the sub workflow (might also be static)</p>

URL: KNIME Community Try Catch with workflows https://community.knime.com/c/ask-the-community/question-about-fail-in-execution-behavior-with-call-workflow-and-try-catch#comment_wrapper_107011269?u=mlauber71
URL: Call sub workflow from a mother KNIME workflow https://kni.me/w/uPGki0nVinczB7SZ
URL: (48189) second forum entry https://forum.knime.com/t/call-workflow-table-based-not-accepting-variable-with-path/48189/6?u=mlauber71
URL: Run multiple instances of another workflow in parallel https://hub.knime.com/-/spaces/-/~7olAIqh7Cqf6h8x_/current-state/
URL: Medium: KNIME, Paths and Loops — Automate Everything https://medium.com/low-code-for-advanced-data-science/knime-paths-and-loops-automate-everything-213455788685

You can try to identify a failure in a subworkflow and trigger a case when in the main one

https://community.knime.com/c/ask-the-community/question-about-fail-in-execution-behavior-with-call-workflow-and-try-catch#comment_wrapper_107011269?u=mlauber71

In order to get a Workflow Service Input / Output other than the table connection you have to:

  • drag the connection of the type you want from the previous node

  • until a transparent plus sign appears

  • then you search for the "Workflow Service Output"

  • when you click this it will change the type from table to the type you were just dragging along ....

THX to Linh for this insight ...

https://forum.knime.com/t/call-workflow-table-based-additional-table-input-ports-possible/83894/2?u=mlauber71

Table Row to Variable
*- Sub
List Files/Folders
Table Creator
locate and create /data/ folder with absolute paths
Collect Local Metadata
CASE Switch End
var_portvariable fromsub workflow0 = success = top port1 = failure = bottom port
CASE Switch Start
v_filter_rows=1 fail=2 success
Variable Creator
knime://knime.workflow/../data/result.xlsx
Excel Writer
../Call Workflow - Subcall workflow from the same folderand send a table thereand some Flow Variables ...=> you might have to apply the settings from the"Call Workflow - Sub" once
Call Workflow Service

Nodes

Extensions

Links

Download

To use this workflow in KNIME, download it from the below URL and open it in KNIME:

Download Workflow
Created by: sande
Created at: 2022-08-05
On NodePit since: 2026-06-19
Last update: 2026-06-19
Created with KNIME version: v5.11.1
Tags: callworkflow

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