ERROR in Loader project\node_modules\preprocess\lib\preprocess.js didn't return a function

[flyon]

I did

npm install --save preprocess

and in webpack

module: {
    loaders: [
        {test: /\.tsx?$/,loader: "preprocess!ts-loader"}
    ],

but webpack says:

 ERROR in Loader F:\wamp-new\www\dacore\modules\browser-core\node_modules\preprocess\lib\preprocess.js didn't return a function

using webpack 1.13. Will try upgrading to webpack 2 now

Edit: similar error with webpack 2:

Error: Module 'F:\wamp-new\www\dacore\modules\browser-core\node_modules\preprocess\lib\preprocess.js' is not a loader (must have normal or pitch function)

[scholtzm]

You have most likely solved this by now but for completeness sake, you need to install preprocess-loader not preprocess.