Server stops when loading DIM-1

It’s an 1.10.2 sponge server with Gregtech, IC2, Agricraft and few other mods.
It always crashes when player enters the nether portal.

Plz tell me what mod(or Chunk generation) causes this problem and tell me solution… please…

Try updating to the newest builds of SpongeForge and re-test.

Well, I solved this problem by modifying server.properties option
The error started from generate-structure…
When It is true, it makes problem…
I still think it is the problem of Gregtech but…
I found generate-structure doesn’t change the generation of town, nether castle… etc…

Sorry for bad English;;