Version of Advanced Rocketry

2.0.0-257
The latest code from the 1.12.2 branch on github

Have you verified this is an issue in the latest unstable build

• Y
• [] N
• [] N/A

Version of LibVulpes

0.4.2-87
The latest code from the 1.12.2 branch

Version of Minecraft

1.12.2

Does this occur without other mods installed

• Y
• [] N
• [] N/A

Crash report or log or visualVM (if applicable)

http://pastebin.com is a good place to put them
crash reports that are put in the issue itself are
hard to read

(257 crash report) https://pastebin.com/QrJrXQz4
(latest source code) https://pastebin.com/H0DzMWtg

Description of the problem

Note: The problem occurs exclusively in multiplayer. And the error only occurs in the client.
Description: When trying to view asteroid contents in the observatory, a NullPointerException occurs in the client and no asteroid content information is shown in the GUI.
Step 1: Create 1.12.2 multiplayer server
Step 2: Build observatory multiblock
Step 3: Insert data storage module with distance data
Step 4: Scan for asteroids
Step 5: Click on any asteroid. Nothing will appear in the right hand side of the GUI, and there will be a NullPointerException in the client log.

You've somehow given the asteroid an invalid bask stack? Can I see the asteroid defs?

Here is the file that i'm using.
https://pastebin.com/8qSYA92t

Hmmmm..... I don't see why it's crashing but I'll poke around at the code and see what I can do without an IDE