(Not sure if this is a Migrate or Table Wizard bug. Sorry if I put it in the wrong place.)

After importing a content set in Migrate module, you get new tables called migrate_map_X and migrate_msgs_X. These are conveniently added to Table Wizard for you so you can join to them at admin/content/tw.

However, if you click on one of the views' links -- for example, admin/content/tw/view/migrate_msgs_3 -- you're just taken right back to the table wizard listing as though you hadn't clicked anything at all. I tried clearing the views cache and no dice. Clearing all of the caches causes it to work again, though. As does renaming the view to something else causes it to work again.

I'm guessing this is easy to fix..? I seem to remember running into this on regular Table Wizard views before, too, in previous releases.