android.util.AndroidException: Can't connect to activity manager; is the system running?

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    Root Cause Analysis

    1. android.util.AndroidException

      Can't connect to activity manager; is the system running?

      at com.android.commands.am.Am.run()
    2. com.android.commands
      Am.main
      1. com.android.commands.am.Am.run(Am.java:100)
      2. com.android.commands.am.Am.main(Am.java:81)
      2 frames
    3. Android
      RuntimeInit.main
      1. com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
      2. com.android.internal.os.RuntimeInit.main(RuntimeInit.java:235)
      2 frames
    4. Android Platform
      NativeStart.main
      1. dalvik.system.NativeStart.main(Native Method)
      1 frame