# Cannot find some babylonjs module when starting new typescript project **URL:** \ **Category:** Questions\ **Created:** [November 9, 2023, 9:14am UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564 "2023-11-09T09:14:01Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![mayeths](https://avatars.discourse-cdn.com/v4/letter/m/51bf81/32.png) [@mayeths](https://forum.babylonjs.com/u/mayeths)\ **Post date:** [November 9, 2023, 9:14am UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564/1 "2023-11-09T09:14:01Z")
Hi, I’m new to babylonjs and want to start a new project that uses babylonjs with typescript (and electron). However, I consistently encounter typescript build errors. I create an empty folder with the following `package.json`: ```auto { "name": "yourapp", "version": "0.0.1", "description": "Your Application", "main": "./app/main.js", "scripts": { "build": "tsc", "start": "electron ./app/main.js", "dist": "build", "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "BSD-2-Clause", "dependencies": { "babylonjs": "6.28.1" }, "devDependencies": { "electron": "25.9.4", "electron-builder": "24.6.4", "typescript": "5.2.2" }, "build": { "appId": "yourappid", "dmg": { "contents": [ { "x": 110, "y": 0 }, { "x": 240, "y": 0, "type": "link", "path": "/Applications" } ] }, "win": { "target": "portable" } } } ``` Then after I run `npm install` successfully, I run `npm run build`, result was: ```auto > yourapp@0.0.1 build > tsc node_modules/babylonjs/babylon.module.d.ts:28800:28 - error TS2307: Cannot find module 'babylonjs/Animations' or its corresponding type declarations. 28800 import { Animatable } from "babylonjs/Animations"; ~~~~~~~~~~~~~~~~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:28819:52 - error TS2307: Cannot find module 'babylonjs/Animations' or its corresponding type declarations. 28819 import { Animatable, Animation, IAnimatable } from "babylonjs/Animations"; ~~~~~~~~~~~~~~~~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:28882:28 - error TS2307: Cannot find module 'babylonjs/Animations' or its corresponding type declarations. 28882 import { Animatable } from "babylonjs/Animations"; ~~~~~~~~~~~~~~~~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:71427:46 - error TS2307: Cannot find module 'babylonjs/Meshes' or its corresponding type declarations. 71427 protected _createVertexBuffers(): import("babylonjs/Meshes").VertexData; ~~~~~~~~~~~~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:71537:46 - error TS2307: Cannot find module 'babylonjs/Meshes' or its corresponding type declarations. 71537 protected _createVertexBuffers(): import("babylonjs/Meshes").VertexData; ~~~~~~~~~~~~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:176187:18 - error TS2300: Duplicate identifier 'Plane'. 176187 export class Plane { ~~~~~ node_modules/babylonjs/babylon.module.d.ts:184603:11 - error TS2300: Duplicate identifier 'Plane'. 184603 class Plane { ~~~~~ node_modules/babylonjs/babylon.module.d.ts:184655:11 - error TS2300: Duplicate identifier 'Polygon'. 184655 class Polygon { ~~~~~~~ node_modules/babylonjs/babylon.module.d.ts:192657:18 - error TS2300: Duplicate identifier 'Polygon'. 192657 export class Polygon { ~~~~~~~ Found 9 errors in the same file, starting at: node_modules/babylonjs/babylon.module.d.ts:28800 ``` My environment is: ```auto Machine: Macbook Pro with M1 Chip OS: macOS 13.2.1 node version: 19.7.0 (installed from brew) npm version: 9.5.0 ``` I have to post stuff like this because the problem cannot be reproduced in the playground. Sorry for the inconvenience, and thanks in advance. ---
**Author:** ![carolhmj](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/carolhmj/32/25918_2.png) [@carolhmj](https://forum.babylonjs.com/u/carolhmj)\ **Post date:** [November 9, 2023, 4:27pm UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564/2 "2023-11-09T16:27:23Z")
I believe @RaananW fixed a build error with duplicate names that involved the Polygon class, is that correct? ---
**Author:** ![nogalo](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/nogalo/32/120_2.png) [@nogalo](https://forum.babylonjs.com/u/nogalo)\ **Post date:** [November 9, 2023, 4:47pm UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564/3 "2023-11-09T16:47:32Z")
Try using es6 packages instead > **[Babylon.js ES6 support with Tree Shaking | Babylon.js Documentation](https://doc.babylonjs.com/setup/frameworkPackages/es6Support)** > > Learn about tree shaking and package management in Babylon.js. `npm i @babylonjs/core` ---
**Author:** ![sebavan](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/sebavan/32/57_2.png) [@sebavan](https://forum.babylonjs.com/u/sebavan)\ **Post date:** [November 9, 2023, 5:36pm UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564/4 "2023-11-09T17:36:15Z")
It has been fixed in version 6.29 but I would advice to wait for 6.29.1 as there is an input issue at the moment and we ll republish in no time. ---
**Author:** ![mayeths](https://avatars.discourse-cdn.com/v4/letter/m/51bf81/32.png) [@mayeths](https://forum.babylonjs.com/u/mayeths)\ **Post date:** [November 9, 2023, 5:59pm UTC](https://forum.babylonjs.com/t/cannot-find-some-babylonjs-module-when-starting-new-typescript-project/45564/5 "2023-11-09T17:59:24Z")
Thanks, it works like a charm!