Factorio Forums

I'm trying to create a mod that uses "on_built_entity" events.
When this event is raised for a placed ghost, I understood that "event.created_entity" should have "ghost_unit_number" to show the number of the final entity.

But "ghost_unit_number" does not seem to exist:

Thanks for the report, i do not see anything wrong here. As far as i know, entity-ghost's inner entity is not assigned a unit number unless it is revived. When entity is destroyed and would leave entity ghost then ghost_unit_number would hold a unit number to be reused when ghost is revived.