Hi @Gokul001 : I have tried this expression but It was not resolved with this expression.
I have solved this by changing data type to generic and use Append Range activity in System–>File → Workbook (instead of using Append Range under App Integration)
Hi one trick to use, use '(single course like : '10 March 2021) in front of dates in excel then it will take that in string format and there will be not issue while reading data in UiPath