On a grid, I created a dynamic action "Row Selection Change [Foex Grid]" with a true action of "Row Select Set Item Values". The intent is when a row is selected in the grid to modify a page item value in another pane.

This works, but I cannot set values from the grid when the report column is set to Hidden or Display=No.

We need to set values that the user would not see such as sequence key or similar.

You must set the column type to Hidden for it to be iincluded in the report data e.g.

so your report attributes should look like this for hidden columns (tick mark indicates correct setup)