Flash storage Module, any js type , web pages, css, js and images

I have litle bug i don`t understand ...

function startDevice(){
  require( fs.item('Generalscript').module() );
  var Generalscript = require("Generalscript").Generalscript;
  var gs = new Generalscript();
  gs.getVer();
}

Uncaught Error: Both arguments to addCached must be strings
 at line 1 col 41
Modules.addCached(this.k,this.toString()),this.k;
                                        ^
in function "module" called from line 1 col 42
require( fs.item('Generalscript').module() );
                                         ^
in function "startDevice" called from line 23 col 24
           startDevice();
                       ^
in function called from system