Getting this error:

Error: Local workspace file ('angular.json') could not be found.

Introduction

I noticed that after updating angular cli, my existing project started giving this error. Error: Local workspace file ('angular.json') could not be found.

This is complete error

Error: Local workspace file ('angular.json') could not be found.

    at WorkspaceLoader._getProjectWorkspaceFilePath (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\workspace-loader.j

s:44:19)

    at WorkspaceLoader.loadWorkspace (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\workspace-loader.js:31:21)

    at ServeCommand._loadWorkspaceAndArchitect (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\architect-command.js:18

9:32)

    at ServeCommand.<anonymous> (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\architect-command.js:55:25)

    at Generator.next (<anonymous>)

    at E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\architect-command.js:14:71

    at new Promise (<anonymous>)

    at __awaiter (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\architect-command.js:10:12)

    at ServeCommand.initialize (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\architect-command.js:54:16)

    at Object.<anonymous> (E:\PROJECT\MyProjects\NewAngDemoAppWithRoute\node_modules\@angular\cli\models\command-runner.js:90:23)

Solution for the problem

This issue is faced because of mismatch of angular cli version. In older versions file "angular-cli.json" was used for configuration purpose in angular project but angular cli version 6.1.1 used "angular.json" file for configuration. Just run below command.

ng update @angular/cli

It will update your cli version and problem resolves.