Hi,
rewrite code from the first post.
I posted whole this code somewhere else in aanother post, but cannot find it.
Basically you need to open & close transaction for every change, that’s why it’s inside ‘for’ loop. Or mby I’m totally wrong, but at least it works this way 
Marking solution for dynamo player is kinda wrong, cause u won’t run dynamo player in revit 14/15/16