Hi
This is my first post, so be gentle with me if I'm asking a noddy question.
I have an approval flow that is manually called that approves a file (XLSX/DOCX etc)
Some of the columns relating to to file are Mandatory so I want my flow to stop & report this rather than falling over with "Unable to process template language expressions for action 'Condition:_Required_Columns_Not_Populated'"
Is there an if available/Is known function available. Currently I've been trying:-
what's in the Condition image.
Any help would be greatfully received as I've spent ages Googling this with no luck.

