MotionBuilder provides various methods for executing scripts. You can choose any of the following methods to execute a script: 
	 
- Drag and drop a script from the Asset browser 
		
 
- Execute a script via the Python Editor 
		
 
- Place a Python tool in the 
		  PythonStartup folder 
		
 
- Run a script using a keyboard shortcut 
		
 
- Use the Function FBApplication::ExecuteScript 
		
 
- Launch a script from the Command Line startup 
		
 
To launch a script from the Command Line startup, run 
		
motionbuilder.exe [flag] <Python script or FBX file>
 
	  
You can pass either a Python script or an FBX scene file to 
		motionbuilder.exe but not both. 
	 
You can optionally call 
		motionbuilder.exe with flags or command line options. 
	 
To see a full list of flags, command line options, and environment variables, run 
		
motionbuilder.exe -help