I started my workflow with
Assign Activity with directory.getfiles
For Each
Excel process scope for input
Use excel file
Read Range
Excel process scope for output
Write data table
Assign for i=i+1
Build data table
Filter data table
if-
This is not work for me
May be your filter is not working…if you are trying to filter on number do not use double quotes…check the roll no column format and accordingly use a integer or string to filter
If not please provide some screenshots or some more details on exactly where you need help and what input is there and what expected output is