Originally Posted by lucbloom
This solved it for me:
Edit ~/.android/adb_usb.ini file to make sure that there is no extra empty line after the 0x0006 line entry
For other users: I also found this:
HTC Sync Manager has adb.exe at location C:\Program Files\htc\htc sync manager\htc sync\adb.exe
You have 2 options now:-
1) Delete this adb.exe
2) Copy latest adb.exe from android sdk to this path.
Note: You need to make the 2 copies of adb.exe in sync always(when android sdk is updated) else this problem will come up again.
On windows 7, you can make a link of adb.exe from android sdk to this folder, which will avoid copying manually.
C:\> cd "C:\Program Files\htc\htc sync manager\htc sync"
C:\Program Files\htc\htc sync manager\htc sync\> mklink adb.exe C:\<path to your sdk>\platform-tools\adb.exe