Models & Props
Static prop models [model directory/name] outside the map [coordinates]
At the present time, this error also seems to come up in some Valve official vmfs as well. In some cases this can simply be ignored, but this error is generally attributed to a large leak and the models noted are closest to the leak noted. It would be a good idea to go and check out the coordinates in your map to see if any leaks are actually there.
Error loading studio model [model directory/name]
This simply means that the compiler cannot find the model in the directory with the name you specified. Check your spellings and paths for models. This can arise when using Counter-Strike: Source models in a Half-Life 2 configured Valve Hammer Editor and vice versa.