Upgrading from d6 to d7: getting puzzling 'requirements problem' error I am trying to upgrade from d6 to d7 and I'm getting a requirements problem immediately after running upgrade.php. It seems there's some crucial information missing. For me, at least: absolutely no clue what is happening here.

I've got the Ad module (as well as ad_image, ad_flash) enabled

The error that is thrown back at me is:


  upload (Missing): Unresolved dependency, Flash Ad requires this module.
  upload (Missing): Unresolved dependency, Image Ad requires this module.


See screenshot
Before upgrading the drupal core, you must deactivate your contrib modules. I think you did not.?

Upgrade the core first. Then upgrade any contrib modules.
If you have used cck in drupal 6, you will need the cck module to do the migration.