Android Error – The Connection to adb Is Down and a Severe Error Has Occurred

If you get the following error:

The connection to adb is down, and a severe error has occured.
You must restart adb and Eclipse.
Please ensure that adb is correctly located at 'D:Androidandroid-sdk-windowsplatform-toolsadb.exe' and can be executed.

This is how it looks in Eclipse:

Solution 1

As the message says, you need to restart adb. To do that, go to the "Devices" view. If you don’t have it open, go to "Windows" in the navigation bar, open the drop-down menu, click "Show View" and then "Other…" in the submenu.

In the window that opens, expand the "Android" folder. Then select "Devices" and finish with "OK".

The "Devices" view will now be open in Eclipse. On the right there is a drop-down arrow, where you’ll click "Reset adb".

It takes a few seconds to work. When it finishes, you may see something similar to the following image in the "Console" view. Everything will have gone well.

Solution 2

This solution does the same thing as the previous one, so if the previous one didn’t work for you, this one isn’t guaranteed to work either.

We’ll use the command terminal for this. Search in Windows for: cmd

In this window, type the path to "adb.exe". For example, if you installed the Android SDK on the C drive, searching for "adb.exe" you’ll find it in C:Androidandroid-sdkplatform-tools. So to go to this path, type in the terminal: cd C:Androidandroid-sdkplatform-tools

Press the "Enter" key and on the next line type: adb kill-server

Press "Enter" again, and on the next line: adb start-server

Press "Enter" one last time and after a few seconds it will tell you that it has been restarted successfully.