webpack fails to run

[daixtrose]

Using node v5.4.1 and npm version 3.3.4 on Windows 10, see the error message:

rxvision>webpack
Hash: 977274e9a5b657663896
Version: webpack 1.13.2
Time: 7094ms
         Asset     Size  Chunks             Chunk Names
kefirvision.js   114 kB       0  [emitted]  kefirvision
 playground.js  3.88 MB       1  [emitted]  playground
   rxvision.js   106 kB       2  [emitted]  rxvision
      tests.js   844 kB       3  [emitted]  tests
        viz.js   175 kB       4  [emitted]  viz
playground.css  10.8 kB       1  [emitted]  playground
       viz.css  2.02 kB       4  [emitted]  viz
    + 590 hidden modules

WARNING in ./~/babel/lib/babel/util.js
Critical dependencies:
70:11-31 the request of a dependency is an expression
 @ ./~/babel/lib/babel/util.js 70:11-31

WARNING in ./~/babel/lib/babel/transformation/file.js
Critical dependencies:
229:33-45 the request of a dependency is an expression
 @ ./~/babel/lib/babel/transformation/file.js 229:33-45

WARNING in ./~/babel/lib/babel/transformation/file/index.js
Critical dependencies:
208:33-45 the request of a dependency is an expression
 @ ./~/babel/lib/babel/transformation/file/index.js 208:33-45

ERROR in ./wrap/kefir.js
Module not found: Error: Cannot resolve 'file' or 'directory' ../tests/kefir/two-sources.json in C:\Users\numer\Documents\PROJECT\rxvision\wrap
 @ ./wrap/kefir.js 110:37-79

ERROR in ./tests/kefir/index.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./two-sources.json in C:\Users\numer\Documents\PROJECT\rxvision\tests\kefir
 @ ./tests/kefir/index.js 14:33-62

ERROR in ./wrap/kefir.js
Module not found: Error: Cannot resolve 'file' or 'directory' ../tests/kefir/one-source.json in C:\Users\numer\Documents\PROJECT\rxvision\wrap
 @ ./wrap/kefir.js 112:36-77

ERROR in ./tests/kefir/index.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./one-source.json in C:\Users\numer\Documents\PROJECT\rxvision\tests\kefir
 @ ./tests/kefir/index.js 12:32-60

ERROR in ./wrap/kefir.js
Module not found: Error: Cannot resolve 'file' or 'directory' ../tests/kefir/multiple-sources.json in C:\Users\numer\Documents\PROJECT\rxvision\wrap
 @ ./wrap/kefir.js 114:38-85

ERROR in ./tests/kefir/index.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./multiple-sources.json in C:\Users\numer\Documents\PROJECT\rxvision\tests\kefir
 @ ./tests/kefir/index.js 16:34-68

ERROR in ./tests/kefir/index.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./create.json in C:\Users\numer\Documents\PROJECT\rxvision\tests\kefir
 @ ./tests/kefir/index.js 18:29-53
Child extract-text-webpack-plugin:
        + 5 hidden modules
Child extract-text-webpack-plugin:
        + 4 hidden modules