Hi All, I've been working my way through the Realistic Outdoor Environments tutorial and had reached part ten without a problem. I've just created a rough hill terrain and done some renders of my grass. Then I shut down for the night. When I next open up my scene and go to play my particle simulation it generates particles without their instanced grass shapes and gives me an error message '//Error: An execution error occurred in the creation expression for particleShape1.'

Attached are some pics and also my scene file if anyone wants to have a look and see if they can work out what's gone wrong.