Hi… I’m sorry… my mistake…
This is working fine. And it adds all the data in excel files into one file… Check it out…
merge datatable.xaml (9.8 KB)
Sorry again for the previous one 
Hope this one helps you to get it to work 
I got data from two excel files and added the data of those two into one… That worked fine over here…
Let me know how it goes…
ashokkarale
MD_Farhan1
Ajay_Mishra
postwick
Dheerendra_vishwakarma
Anil_G
chandreshsinh.jadeja
Gautham_Pattabiraman
vrdabberu
aravindbalineni123