Hi Philippe, I have added an event called CNRTEST to the start of the Pequot War scenario with a SelectSubUnits command using Domains $Land.
I get the same problem - no units selected even though a settler unit exists in the region. Files attached.
No error in this script
--------------START OF SCRIPT----------------
Line 3: SelectFaction, selected: Great Britain
Line 6: SelectFaction, selected: Great Britain
Line 8: Started processing event: evt_nam_CNRTEST
Line 8: This event is not yet referenced, base number of allowed occurences 1
Line 12: Entering triggered actions for event evt_nam_CNRTEST
Line 13: SelectSubUnits finished Regions Selected: 0 SubUnits Selected: 0
Line 14: [WARNING] AlterCuSubUnit: Selection is empty (Apply To List)
Line 16: Finished processing event: evt_nam_CNRTEST
Line 16: ------------------------------
Cheers, Chris