Deployed version Uipath

I have used read range activity for read excel in development version uipath and its working good. But when i used same thing in deployed version uipath is not working and showing error that “object reference not set to an instance of an object”.

please help any one.

Hello there,
Just suspecting that after deployment, may be possibility of add header property of read range got unchecked. Do you mind inspecting XAML file in notepad/++ and see whether it contains add header property checked?
Are you using Excel Read range ? if so please update to newer version .

Does error occurs with Workbook read range activity ? give a try.