Display error messages in Visual Composer if Input Data is not valid

Hi,

We developed a small iView with a single input field FO (Factory Order).

The output is a table with some fields corresponding to the given FO.

My requirement is if the given FO (Factory Order) has no data then the table should not be displayed, instead a message should be displayed saying

'No Data is found' and stop the program.

Please reply soon if anyone has got a solution.

Thanks,

Shashidhar