David, this means the the 'mason' directory is not in your CLASSPATH  
environment variable.

Sean

On Nov 23, 2010, at 1:15 PM, David Morrissey wrote:

> Hi,
>
> I am new to Mason and would like to run some Network simulations,  
> but I
> can't seem to get my feet off the ground.  I seem to be able to get  
> things
> to run fine from Netbeans but when I try to compile from the  
> terminal java
> can't seem to find the Mason packages.  I think this is a very basic  
> error
> but here it is:
>
> david@Calculo:~/netbeans/mason/sim/app/tutorial1and2$ javac  
> Tutorial1.java
> Tutorial1.java:3: package sim.engine does not exist
> import sim.engine.*;
>
> Any help is greatly appreciated.
> Thanks,
> David