Oop, my apologies for the long delay in answering; I totally didn't even see a discussion had started. XD

Did you ever track down the source of this issue? I've looked through the mod itself and there should be nothing there that impacts instruments at all; there are no new or modified materials involved, just reactions.

No, but I can test this again later by making a world with this mod only to confirm it really is it causinh this. Will get back to you.

Yes, can confirm. Made a world with no mods beyond this, and when trying to create the generated keyboard instrument Astis, I can build the bellows, the pipes, the chest, but the keyboard is nowhere to be found. Placing a Work Order for it, the order gets approved but never done because it's simply not in the crafting list anywhere for any of the workshops it should be in. It definitely is caused by your mod.

Hmmm, that's very odd. I'm trying to replicate it now.

What material are the missing parts supposed to be made of? You can usually find out by setting conditions on the work order. Is it always the same material for missing pieces?

Update: I've generated several new worlds with the only mod being Smelt Ore By Product, and can't replicate this issue; every piece is showing up in the workshops. I'll try a few more, but I suspect something may have modified or corrupted your vanilla raws?

Originally posted by Qev:

Hmmm, that's very odd. I'm trying to replicate it now.

What material are the missing parts supposed to be made of? You can usually find out by setting conditions on the work order. Is it always the same material for missing pieces?

Update: I've generated several new worlds with the only mod being Smelt Ore By Product, and can't replicate this issue; every piece is showing up in the workshops. I'll try a few more, but I suspect something may have modified or corrupted your vanilla raws?

I have realized one detail I forgot: I have DFHack installed. I feel that might be causing the issue.

I'm gonna delete my entire DF folder except for my actual saves and reinstall it all (DFHack included) and see if it still happens.

Hope that if it is DFHack's fault you can find a fix, as DFHack is a super popular tool that tons of people use.

I hope that does the trick! I honestly can't reproduce this at all. And haha yeah DFHack is so essential it goes without mention. XD

Originally posted by Qev:

I hope that does the trick! I honestly can't reproduce this at all. And haha yeah DFHack is so essential it goes without mention. XD

Yeah I am sure this has to be an issue with DFHack. Did you use it in your tests? I can send you the world I just created where the issue happens so you can see it for yourself. Always one of the instrument pieces is missing. I did also try it with DFHack and no mods and the instruments work fine then.

Yeah I'm always running the latest DFHack, I just can't do without it. :) But I think I've generated like 15 worlds so far and every instrument piece shows up in the workshops without fail (though it took me a while to work out which workshops... XD). I *think* the only instrument piece workshops are Crafts, Forges, Kilns, Glass, and Leather (the wiki hasn't been updated on this particular)?

I'm currently away from my main PC, but yeah if you want to upload a save someplace I'll gladly take a look when I get back!

Originally posted by Qev:

Yeah I'm always running the latest DFHack, I just can't do without it. :) But I think I've generated like 15 worlds so far and every instrument piece shows up in the workshops without fail (though it took me a while to work out which workshops... XD). I *think* the only instrument piece workshops are Crafts, Forges, Kilns, Glass, and Leather (the wiki hasn't been updated on this particular)?

I'm currently away from my main PC, but yeah if you want to upload a save someplace I'll gladly take a look when I get back!

Steam won't let me post links here, so I'd have to DM it to you.