- ert stands for embedded real-time target
- grt stands for generic real-time target
If you are trying to deploy the model on hardware you should use ert because that will make the code correct for embedded systems (like the drone microcontroller).
What will have happened is you will have set the top model level to deploy on the hardware but all the sub-models are still not set to that, so just go through each sub-model to set it to ert.
Also: it looks like you are trying to upload the outer model which includes all the simulation bits like the airframe model, environment model etc. Remember you only want to upload the FlightControlSystem sub-model onto the drone.
