How to update mod pack without breaking Thaumcraft aura nodes?

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ThemsAllTook

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Jul 29, 2019
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(Apologies if this is a duplicate, a cursory search didn't show me another thread about this issue)

Every time I've updated my mod pack to the latest version (using the Mindcrack pack), all of my aura nodes from Thaumcraft have been wiped out. Most recently, when I updated to v7, I made sure to copy my old Thaumcraft.cfg into the config directory before loading my world. Since I had the issue during a previous update, I have aura_nodes set to true, and regen_key set to "NOT_DEFAULT". Even doing this, after loading up the world, no aura nodes were present and my wand wouldn't charge. I had to change regen_key again to get it to fix itself.

This doesn't make any sense to me - if the regen key is the same and the world save is the same, how does an update manage to wipe out all the nodes? Is there something else I can do to preserve them during updates? I can investigate further and write up formal bug reports for the FTB launcher and/or Thaumcraft (not sure which one is the cause) if this isn't a known issue.
 

Icarus White

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Jul 29, 2019
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I believe what you're looking for is auras.dat in the world directory, although I haven't played around with backing up the aura nodes myself. No idea why they'd wipe, though - perhaps some interaction between the config file and the aura file?
 

ThemsAllTook

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Jul 29, 2019
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Cool, I took a quick peek at auras.dat with NBTExplorer. Not that much info I can get out of it at this point, but I'll have to make a backup and do a diff next update to see if I can find anything useful then...