fiori app accepting wrong input for scan

[#1]

Hi,

in fiori app client wants to give 2 inputs material information and batch no like this, if we give wrong batch no it is showing error message "please scan correct batch no" but if we give wrong material info and correct batch no it is not showing any error here they wants to show error message if we give wrong material info also.... i don't know in which method i have

to debug, breakpoint is not triggering for that case