https://i.imgur.com/zDr7CtP.jpeg

It's saying there's an undersupply of Tungsten, when theres plenty available. It also doesn't show the actual undersupply of explosives.

Hmm, interesting. Would you be able to share the save?

Another couple of thoughts:
- There is no numbers indicating progress (for undersupply it's the # of requesters), which may mean that it's not been refreshed for a few seconds at least
- What happens if you right-click on the Tungsten? It will show the places where it things Tungsten is being requested, which might help understand why it thinks there is undersupply.
- Finally, what do the mouse-tooltips for the undersupply items say?

Except that undersupply sometimes is a little out of date, the only inaccuracy I'm aware of is that there is an inconsistency: When I ask Factorio how much Tungsten is "available", it tells me the number available, but less anything that's reserved by bots on their way to pick it up. I don't "manually" recount what is actually available, which can sometimes lead to some slightly wrong results.

https://i.imgur.com/N4S7bZH.jpeg
This is taken an hour later after I made the first post, and you can see the tungsten is still showing as undersupplied, even though I would assume it's not since there's some on the way? And the calcite shows no problem despite being the same condition (on the way.)

Maybe I'm just misunderstanding, but it doesn't seem right to me.

https://i.imgur.com/xtce80f.jpeg
Here you can see it shows shotgun shells as undersupplied, even though the request is fullfilled. They aren't requested anywhere else.

Edit: Right clicking just takes me to the requester chest I've shown in the pic. Since the numbers haven't changed the past hour, maybe something is stuck or not getting updated?

Edit 2: Savefile: https://drive.google.com/file/d/1qsf0_rWhCRkrTx-Ejsh-wRbpKgzwVQze/view?usp=sharing

Thank you! I downloaded the 300 or so mods your save uses to see if they might have something to do with it, but I don't think they did :) Instead, the save was busy scanning a network that no longer exists, and I had forgotten to check for that in a crucial place. As a result, the Undersupply calc never actually finished and what you saw must be very old data.

I'll upload a new version that fixes this issue shortly. Thanks again!

Ah, yeah I could imagine that happening when you delete a connecting roboport causing one network to split into two, and then later deleting one of the networks. It's either that or I was messing around in blueprint sandboxes (mod) and I cleared the surface of all roboports.

Thanks, will check it out tomorrow :)