Hi Govind Ramchetty,
Let me know if I got your problem well:
- Your friend has a dashboard
- You have a dashboard
- You both have the same viz on this dashboard but you have different parameters
- When he exports it on Tableau Server it works well
- When you export it on Tableau Server it doesn't work.
Is that it?
Could you please let me know your Desktop version? Server version?
Same for your friend please.
Feel free to provide me with your workbooks as well!
I was typing up a long response about best practices but these two resources are your best bet. They state things more eloquently than I was :-)