Where are MonoDevelop error files?

I have recently been working on a game and I am creating a flying concept. Whenever I build the project it says Build: 1 error, 0 warnings Then I click on the message. It then says

Error: Build failed. See the build log for details.

Where is the build log???

Here is my code:

#pragma strict

var cMotor: CharacterMotor; // reference to the CharacterMotor script

function Start(){ // get the CharacterMotor script at Start:
   cMotor = GetComponent(CharacterMotor);
}

function Update(){ // move player upwards while F is pressed

if (Input.GetKey(KeyCode.F)){
    cMotor.SetVelocity(Vector3.up*6);
}
else if(Input.GetKeyUp(KeyCode.F)){
    cMotor.SetVelocity(Vector3.up*0);
}


 if(Input.GetKey(KeyCode.G)){
     cMotor.SetVelocity(Vector3.down*6);
}
else if(Input.GetKeyUp(KeyCode.G)) {
    cMotor.SetVelocity(Vector3.down*0);
	}
}

// This do-nothing function is included just to avoid error messages
// because SetVelocity tries to call it

function OnExternalVelocity(){
}

Thanks!

It’s usually in the console, when you start the game it won’t let you play right? Next to project (unless you edited the unity layout) there should be a console tab, if it’s empty just click play and it should tell you what’s wrong.