I don’t think you were actually meshing, or at least in the file there was only true for write and not run in SHM component. I have adjusted the definition a bit, adding a small native GH of finding logical values for your wind tunnel based on your geometry, adding castellated and snap in the SHM options (it might be ok to not snap here but we almost always need to snap in production), and have added a small offset to your monitoring surfaces to ensure you don’t get values outside of the mesh.
I don’t see a reason this won’t run end-to-end successfully. If it does not, please post here the logs for blockMesh, SHM, and solution, which you can find in the logs folder of the case.
180702_01_0_outdoor_airflow_VM2_TG.gh (518.9 KB)