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#1 Posted : Tuesday, December 5, 2017 9:42:51 AM(UTC)

Groups: Registered
Posts: 20

I have an Angular2 application that uses Leadtools. It uses Angular-CLI and webpack to build.

When I attempt to even place the Leadtools.Documents.d.ts in my application folder structure, I get the following error:
Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
at createSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:16640:109)
at parseSourceFileWorker (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:16572:26)
at Object.parseSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:16521:26)
at Object.createSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:16371:29)
at WebpackCompilerHost.getSourceFile (D:\Apps\PCV2\node_modules\@ngtools\webpack\src\compiler_host.js:239:27)
at findSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70246:29)
at args (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70200:85)
at getSourceFileFromReferenceWorker (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70173:34)
at processSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70200:13)
at D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70287:17
at Object.forEach (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:1506:30)
at processReferencedFiles (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70285:16)
at findSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70270:21)
at processImportedModules (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70393:25)
at findSourceFile (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70274:17)
at processImportedModules (D:\Apps\PCV2\node_modules\typescript\lib\typescript.js:70393:25)

Removing this file removes the error.

Any help would be appreciated.

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#2 Posted : Thursday, December 7, 2017 2:48:51 PM(UTC)
Anthony Northrup

Groups: Registered, Tech Support, Administrators
Posts: 199

Was thanked: 28 time(s) in 28 post(s)

Hello Kevin,

Apologies for the long delay before getting a response from us. There is an issue on the angular-cli github that appears to be exactly what you're experiencing: https://github.com/angular/angular-cli/issues/5053.
Looking through that, it could a number of things, here are two to check for starters:

  • Ensure any file referenced in the .d.ts files via ///<reference path="./foo.d.ts" /> exists
  • Check if you have a file environment.prod.ts, below is an example from one of the users on the issue linked above


export const environment = {
  production: true,
  silent: false
Anthony Northrup
Developer Support Engineer
LEAD Technologies, Inc.

#3 Posted : Friday, December 8, 2017 9:26:14 AM(UTC)

Groups: Registered
Posts: 20

Thank you. The references in Leadtools.Documents.d.ts was the problem.
I changed:
/// <reference path="jquery/jquery.d.ts" />

To point to the jquery index file in my node-modules:
/// <reference path="../../../../../node_modules/@types/jquery/index.d.ts" />

This solved my issues.
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