The formula in my workflow to change the variable value works correctly, so I get the correct data, but the result is still an array, so the information is not stored in the variable “gekozen_repetitiedatum” that is of type “object”.
BUT…
I now found the Action.Result[0] in the fourth tab (workflow) and added a second action to change the value of my object-variable.
AND… this seems to work.
I can now further test the workflow.
But it seems that you helped my by pointing me in the correct direction. THANKS