Ok,

So no problem, the error is a old one : you have a corrupted installation.
This can happens if the server (repository) fails(or send a corrupted) to send you a file and it doesnt get installed properly.

What you should try (if didn't try) because it really solved everyone's with the same error problems is : run canola-cleanup, remove all other repositories but the basic ones, reboot, refresh the application list. Make sure your connection is working perfectly by installing some small application (like the camera or other) and after that install Canola.

If the ecore is not there is because of some dependencie problem and your first re-install / clean up must have been stopped by some odd / not expectable different repository.

What we can guarantee is : on a clean device, or device only with the apps from maemo and maemo extras repository we install canola just perfectly (several times tests in multiple versions etc)

Let me know if this helps

Marcelo