Hi guys, Im new using the call workflow nodes and Im trying to figure out how to handle them. Here is the thing, I need two actions: 1- send some variables from the caller to the callee 2- get two tables from the callee to the caller, so then I can triger other workflow. below I leave some screens of my current set up and how I linked them to the call workflows, but each of them provide me only one the functions I need: A- Call workflow Service properlly identify the two workflow outputs from my child, but when I execute it none of the variables passes thru, so the workflow fails on execution. B- Call worfklow (table based) passes all the variables with no problems to my child, executes perfect the child workflow, but it does not recognize the two workflow outputs, in fact it ends as shown in the picture with the little red X as if it is empty (but nope, both tables have full data in them) CALLER WORKFLOW [image] Callee workflow [image] Screen from the “call workflow table based“, as you can notice the credentials and variables are recognized, but no Outputs are recognized :frowning: [image] screen from the “call workflow service“, where you can see that the two workflow outputs are being recognized, but no variables goes thru :frowning: [image]

@GQRanalytics maybe you can check the examples mentioned here: [image] Call multiple workflows one after each other with waiting until they finish KNIME Analytics Platform @Michal_Firyt you can put the Calls in a Row and connect them thru a Flow Variable . The Flow Variable can go into the sub-workflow to continue making sure the order is being followed. [image] The Sub-workflow could look like this: [image] When adjusting the ports please take note about this: [image] Dynamically passing component as input to another component KNIME Analytics Platform @AJ1 maybe you can check this out. I adapted the idea of @nan and created a switch to call different workflow being stored as .knwf files (you can create them elsewhere). Obviously the KNIMW WF will have to have the same number of input and output ports to match. Otherwise, you will have to refresh the port settings once [image] Settings to store the captured workflow as .knwf file: [image] And the configuration of these workflow input and output is somewhat complex if you do not want to use the table port. [image] Call Workflow (Table Based) - additional table input ports possible? KNIME Analytics Platform @MartinDDDD this is a tricky one. You will have to define the “ Workflow Service Input ” in the sub-workflow like this: You can not configure this right now at the ports of the node but have to drag the connection from the node before and then create the Workflow Service Input. There is a ticket to improve on that I think. And then adjust the port in the main workflow [image]

passing variables in call workflow service

KNIME Server

mlauber71 March 5, 2026, 6:41am 3

@GQRanalytics maybe you can check the examples mentioned here:

And the configuration of these workflow input and output is somewhat complex if you do not want to use the table port.