@driven said:

what are you actually doing?

open new drawing...
import dae, purge, export purged dae...

2.times{Sketchup.send_action('editUndo;')}

start again...
maybe you don't even need the 2.times....

yes, I just need to keep repeating the process: import a dae , purge, export purged dae, and deal with the next dae.

thank you very much...

I have many *.dae files (about 10 thousand) that must be purged in SketchUp. So I write a plugin to deal with the *.dae files. How to delete a imported model in ruby?

Here is my ruby scripts, but the code doesn't have any effects.

model = Sketchup.active_model
entities = model.active_entities
entities.each { |singleEntity|
entities.erase_entities singleEntity
}