memory writing errors

every time we try to download a new program on the Cortex for eacyC4, we get memory writing errors. Does anyone know why this or or why this might be happening?

That happens to us too. It something with VEXnet
the only way to do it is to keep trying until it works (it helps to put the controller right next to the VEXnet). Otherwise just unplug your keys and use a direct tether

you also could try cycling the power on the robot and controller if you are set on downloading wirelessly. it is bound to happen a lot though, especially with other wifi networks present or other robots on around.