Menu error: First argument is expected to be a valid callback

I'm not 100% sure why this fails, my idea is that since the module has a weight of 1, it could be that it is not yet loaded... I will do some testing in at attempt to see what's happening.

The full error is as follow when I go to my account and click on Orders:

warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'uc_recurring_user_access' was given in /usr/clients/www/drupal/includes/menu.inc on line 452.

Although I get this error, the list of orders appear as expected.

Thank you.
Alexis