Grass fields 19 to 40 in Colborough Park Farm 2015 are not automatically scanned by Courseplay.
Also they can not be scanned manually.
This mod provides grass fields edges path for fields 19 to 40 so that you’ll be able to generate courses in these fields.
Installation: unzip courseplayFields.xml file in your savegame folder.
If you already scanned some fields manually, you already have a courseplayFields.xml in your savegame folder. You can overwrite it but you’ll have to rescann these fields manually.