Why row is not there in context error coming when using group by function any one please help me

[ppr (Peter Preuss)]

for LINQ we dont have to add additional packages

we would recommend to add AsEnumerable to dt → dt.AsEnumerable

maybe you can share with us some sample data

also have a look here:
[FirstAid] Handling of The source contains no DataRows exception - News / Tutorials - UiPath Community Forum

[HowTo] LINQ (VB.Net) Learning Catalogue - Help / Something Else - UiPath Community Forum