Type <typename> in <path> is part of the declaration of 2 modules...

Hi, I got this error after loading tsconfig.app.json.

{
	"extends": "../tsconfig.json",
	"angularCompilerOptions": {
		"paths": {
			"eyc-sol-ant-pln": [ "../my-lib/src/public_api.ts" ]
		}
	},
	"compilerOptions": {
		"outDir": "../out-tsc/app",
		"module": "es2015",
		"baseUrl": "",
		"types": [],
		"paths": {
			"eyc-sol-ant-pln": [ "../my-lib/src/public_api.ts" ]
		}
	},
	"exclude": [ "test.ts", "**/*.spec.ts", "**/*.mock.ts" ]
}

I don’t really think, the module is declared in two modules, it is only declared in CoreModule:

Isn’t it the problem with paths (/ vs \, I’m on Win10)?

[riscie]

@mgechev that does not cut it for me, I get the same error with or without exclude / include properties.

[augustincalin]

Actually, reproducing this is quite simple (Windows 10).

ng --version

Angular CLI: 1.6.7 Node: 8.9.4 OS: win32 x64 Angular: 5.2.7 … animations, common, compiler, compiler-cli, core, forms … http, language-service, platform-browser … platform-browser-dynamic, router

@angular/cli: 1.6.7 @angular-devkit/build-optimizer: 0.0.42 @angular-devkit/core: 0.0.29 @angular-devkit/schematics: 0.0.52 @ngtools/json-schema: 1.1.0 @ngtools/webpack: 1.9.7 @schematics/angular: 0.1.17 typescript: 2.5.3 webpack: 3.10.0

1. create new angular cli project: ng new ng-rev
2. cd ng-rev
3. generate a module: ng g m ModuleOne
4. add a component in this module: cd src\app\module-one\ and then ng g c ComponentOne.
5. export ComponentOneComponent from module-one.module.ts: exports: [ComponentOneComponent]
6. add ModuleOneModule in app.module.ts imports: imports: [BrowserModule, ModuleOneModule]
7. Try to open the project in ngrev. You will see the error.