I am facing a strange problem. The eclipse is deteting the same device multiple times and thus is unable to run the project showing error as :
Failed to inst
update : It is not needed to restart/close Eclipse
As told in comments by Ved Praksh, the solution is:
Exit Eclipse
End all adb processes from task manager as well.. Then:
In cmd, adb kill-server --> adb start-server --> adb devices
Then restart eclipse.
Most probably it will show only one device this time.