Game crashes when trying to load a save game with items from Immersive Tech in it.

Crash log:
https://pastebin.com/pVmcXc4j

I will try that first. :)

Save loads fine with 1.6, but crashes with 1.7... Same error as before.

@Kurtchekov thoughts? @raymondbh can you provide the savefile?

Our function "RemoveDummyFromTicking" is apparently adding a null value to the list of TEs to be removed. How it does that defies logic since all calls to that function are done by the TEs themselves. If I had to take a guess, the TE in question is getting removed from the world before it's been removed from that list, so I can make a small change to that function so that it checks if they're still valid before trying to remove from the ticking entities list.

@raymondbh Can you try this version of the mod?
testbuild.zip
Unzip the testbuild.jar into your mods folder and don't forget to remove any other immersive tech jar from that folder as well.

Can we get a copy of the save? Have you tried going to the 1.6 version then to the 1.7 version?

Same problem with the testbuild.jar I am afraid.

Savegame and modpack (MultiMC modpack):
https://drive.google.com/file/d/19AsavYQianY9_Zlpl4UpP8tPAzCBqycb/view?usp=sharing

I left the 1.7 versjon enabled, but 1.6 or Immersive Tech are still there to be enabled if you wish.
(In MultiMC you can edit this by "Edit Instance")

@raymondbh Okay, this problem might be caused by one of the other mods, possibly Thaumcraft, but gratefully we can handle this problem on our end. While we prepare to release a new version of the mod, you can play around with this build
immersivetech.zip

That's great news, I will test it as soon as possible.

Edit: That seems to do the trick! Great work, thank you :)