Message is getting printed twice in logs of testcomplete

To run the Include() routine, the entire file is first processed.  In this phase, you run the eval() command and define the Include() function.  You are probably trying to run this routine by right-clicking in the routine and selecting "Run current routine", or perhaps you defined a Project Test Item to call the Include() routine and then running the project.  What you are doing is effectively this:

Include("GlobalConstants.js");
Include();

The second call has no arguments.  Attempting to reference them produces the "undefined".

The Include() routine needs the argument defined.  Rewrite as:

function Runme()
{
  Include("GlobalConstants.js");
}

function Include(file)
{
...
}