better to tell us what is not working.
maybe some analysis within the datatable as described below can help:
[FirstAid] Datatable: Debug & Analysis invalid DateTime Strings / String to DateTime Parsing Issues - News / Tutorials - UiPath Community Forum
here we would suggest
- to look inside the datatable
- to prototype the Selext expression in parts directly within the immediate panel
As an alternate we do have also LINQ in place