Sorry @CeruleanNutter and @Mikirae, missed your posts:
No, because I’m not sure if I can detect that. Not sure doesn’t mean I can’t though, so I’ll investigate that.
Looks like a deadlock to me, nothing I can do about that because Sponge/Forge/Minecraft have taken over there - all I do is ask Minecraft to load some chunks, sorry. 
So there’s no way to load my world without crashing it repeatedly? Because it’s crashing every few percent
im getting errors and almost instant crash whenever i put this into the mods folder.
@Mikirae I don’t think there is anything I can do, I’m sorry.
Without any information, I can’t help you. Stacktraces? Output? Versions?
To be any use a bug-report (if you want anyone to be able to figure out what went wrong), we’ll need more information: what version of SpongeVanilla or SpongeForge (and Forge) are you using, are there other mods present, what version of Nucleus was it, and preferably a link to the server.log file with the crash in it on pastebin or something similar.
EDIT: Beaten to it by dualspiral 
at net.minecraftforge.fml.client.FMLClientHandler.getSavesDirectory(FMLClientHandler.java:577)
at net.minecraftforge.fml.common.FMLCommonHandler.getSavesDirectory(FMLCommonHandler.java:307)
at org.spongepowered.mod.SpongeModGame.getSavesDirectory(SpongeModGame.java:63)
I see, you missed out one crucial detail… you’re running this on a client, something I should be paying more attention to. I’ll try to fix that ASAP - though maybe the Sponge guys want to look at that too as it looks like it’s an API method that failed?
so if i load it in server form i should have no issues. since the sponge plugins dont need to be client side right?
Correct, yes.
You’re fine 
Thanks anyway! 
I don’t know, I tryed moblimit, but it doesen’t work well, it spawns mobs in groups of the same mobss and it leaves a lot of blank areas with out any mob.
I think I will wait for someone that will do that, or when necessary I will do this by my self, I don’t know.
Thanks for the answer.
Was this added? Tried to use it, but was unable to do so, not sure how to 
/world border gen -a should work.
Works with mixins, without it I get:
[18:28:31] [Server thread/INFO]: An error occurred trying to perform that command.
I mean that i can see Admins inventories, but i can’t see players inventories…
Using /invsee Admin works… but if i try /invsee Player i get error that can’t find that name
can someone tell me the entire command to make a alt world super-flat daytime only startup on loadup and set default spawn there???
Perhaps you are away from it. I works great with mixins.
how would you go about teleporting another player to a certain warp?
or just /sudo if you have given them the perm to warp