Gallery 2 Import -> Maintenance

Hello,

I have a Gallery3 working great. This Gallery3 was upgraded from a Gallery2, so today there're old photos from the previous gallery2 and new photos on the new gallery3 all living under the same roof.

Here's my problem, if I try to go to the maintenance menu I get:

Exception [ 0 ]: @todo G2_FUNCTION_FAILED

And its subsequent errors.

If I deactivate the Gallery 2 Import module, then I can enter the maintenance menu without problems, and execute it related chores. Activating the Gallery 2 Import again? Then Exception [ 0 ]: @todo G2_FUNCTION_FAILED reappears. I have executed the rebuild options and others maintenance chores with Gallery 2 Import module inactive, but -obviously- I can't do the same thing with this module active. The bulk of the photos are on the Gallery2, so I feel a lot of them are not included in the maintenance chores because of the previous situation described.

Any suggestion on how to solve this?

Many Thanks.