Hi @Mokrani -
Here’s an example workflow I came up with. Basically you convert the “files” column into a workflow variable, use the Java Edit Variable (simple) node to convert that variable, and set up an If Switch node based on whether “files” is missing or not. If it is, it takes the bottom path of the If switch and fails. Otherwise, the workflow continues.
IfSwitchFailInExecutionExample.knwf (15.3 KB)
