Hi.
On my private server running a few different mods and sponge, I am running into a weird problem where no Rock Crystal Ore spawns at all. Also, every rock crystal that is dropped into the world appears for a fraction of a second and then disappears into thin air with sponge giving me a huge error message (linked here: https://pastebin.com/DZLnNGF5). This obviously makes it very hard to play as I can't grind crystals without them vanishing, for example. I can't seem to find someone else having this issue either so I expect some error on my part, but really can't figure out where to look next.

Forge versions and stuff are listed at the bottom of the paste linked above.
In case it helps, I'm running the following mods:
https://pastebin.com/7nRX4w7x (Sorry about the horrible formatting, but I REALLY can't be arsed to type them all out myself, I'm sure you understand :P)

Seems like some mod prevents me from setting the Properties of the rock crystal onto it or prevents me from accessing the NBT Tag of the item.

The one error you posted isn't really specific about what could've gone wrong, it's just the inevitable result of trying to access the properties of the crystal and then failing due to them not being there.. Along with this error though, its should also give you a crash when you're just (shift-)hovering over a rock crystal.

Now this doesn't answer the question why no rock crystal ore spawns 'at all' unless some mod prevents worldgen of other mods. It's not going to actively retro-gen into the world in case you've added AS to an existing world. For that you'd need to enable retrogen specifically in the config. So the resonating wand is not showing anything anywhere (during nighttime obviously)?

All in all, i'm uncertain to why or how this happens. If it's not too terrible for you and you really want to dig down to which mod causes this, i'd suggest you just try removing mod after mod and see if it now generates rock crystal ores and if rock crystals are properly accessible.

Might be Sponge

Thanks for the quick response.
Of course I forgot to mention that I was retrogening with the respective config option enabled. And I found out that I'm an idiot too, because apparently I was too impatient with the retrogen. I found some rock crystal ore now. So my bad on that one.
The issue with the disappearing crystals still persists though and no crashes when shift-hovering over the crystal (Although shift doesn't change anything for me, it still just shows the following: http://imgur.com/a/e6j5X )
I just threw together a test server and will run some tests. I'll tell you as soon as I find something.

Ouh, yea, right i forgot that i made it crash-safe so it wouldn't crash your client in case the information is missing. It not displaying anything in the tooltip is an indication that its data is missing.
Set of questions:

• Does this only happen with cheated ones from JEI?
• Does it also happen with ones obtained by breaking the ore?
• Do other Items keep their data? (Specifically if you put a constellation paper into the journal, does it keep the constellation paper; is it "still there" if you open the journal-inventory again?)
• Do Constellation papers show the same behavior? (Specifically if you find one and it 'assigns' itself to a constellation you didn't know yet? Does it keep that constellation assigned to it? In case it does so you should be able to see the constellation's name in its tooltip and you should be able to 'open' it via right-click to see the constellation's shape)

@ Doom, yes i also suspect Sponge itself to a degree.

I swear the game is mocking me. And I think I'm still wasting your time by being an idiot. I started taking out mods when I got fed up with always typing /give astralsorcery:ItemRockCrystalSimple, set NEI/JEI to cheat mode and voilá, those crystals work just fine.
As to your questions, I still do not gain anything from breaking the ore. I am mining it with a simple diamond pick, as mischief of mice does in his tutorial.
All other items work as intended, apart from the crash when clicking on the constellations in the journal, which many people already reported.

Sorry for wasting your time if I'm just missing something here...

...Sponge?

Heh.... i know what it is probably. Try removing GalactiCraft and see if it works then.

Indeed, removing Galacticraft did fix the issue. If I remove Galacticraft however, I will get murdered in my sleep by my friends playing on the server, so I guess I'll have to work around the issue for now.
Thanks for your help.
But how did you know?

But how did you know?

I'm an all-seeing god. /s

GalactiCraft is overwriting the playerEntity on serverside and messes with some checks on my end, ultimately causing this to fail. Prepare for some more issues with it until i'm releasing the next update - which will most likely be in the next days.

Great, thank you so much!