A wee bump....

Used the Store Retrieval, dumped all the materials in my places inventory. Back to the map and am stuck - out of travel points.

The fix - moved a 'nade from my bandolier to my backpack.

So if you're planning to retrieve your materials (and there's a lot of it), carry a 'nade (or something) with you.

I believe this is a bug which came up at the cataclysm too - if you're so overloaded that moving would cost more than 1,000,000 stamina points (100% stamina), the game won't let you move. Unfortunately, not everything which alters the weight in your pack checks if it's actually changed, and you need to move something around to make the game notice.

So another fix for this problem might be to pick up something from your store.