Hi John, I am using the world file "empty.world". And yes, the model spawns where I expect it to be. I attached the relevant code. The robot base seems to be correct as it spawns without any problems. Thanks, Ricarda > Hi Ricarda, > > Couple of questions: which world file are you using? Is it possible to > share your model? > If you start up the world paused, does the model spawn where you expect > it to be? > John