Running Ubuntu 12.10 with Emacs 24.3.1 and ECB 2.40. Not sure what actually caused this, other than an apt-get update && upgrade I ran a couple days ago.
It started when I rebooted my computer and I ran Emacs and did M-X ecb-activate I would get the following error:
ECB 2.40 - Error: ECB can only be used with cedet [1.0pre6, 1.1.9]! Please install it and restart Emacs!
I tried a couple of things but have not figured out what exactly caused this issue. I did an apt-get update && upgrade several days ago IIRC and it did update a bunch of packages, so thats a possibility. I ran M-X cedet-version and got:
CEDET Version: 2.0
Requested File Loaded
Package Version Version Version
----------------------------------------------------------
cedet: 2.0 nil ok
eieio: 1.4 nil ok
semantic: 2.2 nil ok
srecode: 1.2 nil Not Loaded
ede: 1.2 nil Not Loaded
speedbar: 1.0.4 nil 1.0
cogre: 1.2 nil Not Loaded
cedet-contrib: 1.2 nil Not Loaded
Any thoughts on what is going on here?
There is a fork of ECB that works with fresh Emacs & CEDET versions. You can install it either manually, or via MELPA (see instructions on the end of page on how activate MELPA).