android studio 2.3 instant run not working

Question

I have updated android studio from 2.2 to 2.3,then I found Instant run not working.

Error while executing: am startservice com.exampl

Answer 1

Instant Run Documentation:

To start using Instant Run, you also need to change the build variant to a debug version of your app and deploy it to a target device running Android 5.0 (API level 21) or higher. To learn about more techniques that speed up your build, read Optimize Your Build Speed

so make sure your build variant is set to 'debug'.