Hi, Table.AddColumn appears to not enforce the column type, or convert the value to the required type. I'll illustrate this with an example: let
Source = #table (
...
You can download an example file here: https://cofin1-my.sharepoint.com/:u:/g/personal/garadford_transcoma_com/ET6lWAjoTGBApeOAADC1YyQBlKwyzyOQ_7hYb_fJPJYd9g?e=dUiwV1 If you refresh, you will see the error.