Excel Write Range Issue With Back-end bot

I used Excel Read and Write range activity in my Automation program.It Works fine when I run Workflow through the front-end bot (i.e Studio) but when I run the same workflow through orchestrator, the bot is reading the data from Excel but not writing in Excel.There is no error shown in the workflow.
Plz, help me.
What is the reason for this?.

Thanks in advance.