Error building Android app in release mode, in Android Studio <p>I'm trying to sign my android app in release mode, in Android Studio.</p> <p>I followed <a href="http://developer.android.com/tools/publishing/app-signing.html" rel="nofollow">this official guide</a>. So I have created the keystore and a private key. Then I tried to Generate the Signed APK, from <strong>Build -> Generate Signed API Key</strong>. But the build fails, with the following error:</p> <pre><code>:app:packageRelease FAILED Error:A problem was found with the configuration of task ':app:packageRelease'. &gt; File 'C:\Documents\myapp\android.jks' specified for property 'signingConfig.storeFile' does not exist. </code></pre> <p>I have also checked the build.gradle configuration. And I have found this:</p> <pre><code> signingConfigs { releaseConfig { keyAlias 'xxxxxxxxxx' keyPassword 'xxxxxxxxx' storeFile file('C:\Documents\myapp\android.jks') storePassword 'xxxxxxxxx' } } </code></pre> <p>but in the same gradle file I have this:</p> <pre><code>buildTypes { release { runProguard false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' signingConfig signingConfigs.releaseConfig } } </code></pre> <p>What's wrong?</p>