Writing a file on demand

[mlauber71]

@knimerin you can use a CASE Switch Start – KNIME Community Hub node to decide to run a (writer) node or not.

You could take a look at this example in the green box:

Error Handling within Table Row to Variable Loop Start

@JGebhard I wanted to build a workflow that would do a try catch anyway. It does follow the model and would try to append sheets to an existing Excel file. In the first instance of the outer loop a _temp.table will be written that would contain the procedures and one could follow if the loop was successfil. [image] Within the component an inner loop would try 10 times (you could adapt that) to finish the job. A Try Catch block would check if the operation was successful and fill a Flow Varia…

Switch Workflow Branch Execution Depending on the Input Data – knime