Error handling for "Select columns by lookup" and in General - how to set up examples?

Hi Ashish and welcome to the Community!

Error handling can be arranged with actions "Call" or "Iterate" that have the "capture errors and continue" mode. It means that you put the workflow logic that can fail into a module, and call the module using the "Call" action in the "capture errors" mode. In this mode, even if the called module fails it doesn't stop project execution. Instead, the output of the "Call" action contains the list of errors.

See the example below:
error-recovery.morph (2.9 KB)

You can use the "Skip on condition" action explained in our tutorials: EasyMorph | Conditional workflows

Make the action skip the action “Select columns by lookup” if the list of values is empty.