This example shows how to use the external tool to increment all numbers in a column by 1. Make sure to adjust the paths in the settings of the external tool node (The script is created inside the workflow in a folder called "test"). Executing this workflow will: 1) Create a textfile in.txt with the contents of the table creator 2) Call a script script.sh which will increment its contents and write that to a new file called out.txt 3) Now the output of out.txt is available at the output port of the External Tool node.