Thank you Manuel, that works perfectly. I can use CallCommand() but I don't want to as it will always call c4d.EventAdd() and as I can't specify which bd to set as the renderview. I tend to not use CallCommand() in a plugin as it is only be able to be called in the main thread (which would be fine in this case) and as it seems to 'simulate' user interaction.

@m_adam Thanks! Thats a perfect explanation that solves many of my issues - even in some of my other Plugins. I am sorry, I did in fact refer to c4d freezing when I said crashing. Sorry for the confusion.