Adding a mod or switching modpack on existing server world

[Inifus]

Sooo. watching a let's play from FTB Infinity and running a server on direwolf20 I am missing ThaumicEnergistics mod. is it safe to just add this mod to my modpack, or would it be better to switch modpack?
I know that I'd probably have to change item id's in the config files.

any tips on how to do this?

I'd want thaumcraftneiplugin aswell. if I switch modpack, would my world become corrupt? would my player file become corrupt?

 

[RealKC]

You would probably have to add all the mods that aren't in Infinity but are in Direwolf20 1.7.10 to Infinity. Also back-up your worls before changing the packs

 

[Inifus]

if I have to add mods anyway, wouldn't it be easier to just add those two mods to the DW20 pack?
I've never added a mod manually to a pack, what steps do I need to do to make the game load correctly, and the server?

 

[Inifus]

if I add the mods in the launcher, and start the game, will the launcher automatically sort the conflicts out?

 

[mc.crab]

If you only want to add a few mods, it is easier to install them rather than switching the whole pack and trying to keep the world. Check that the mods you want to install have all the required mods installed. Taking a backup of your world before adding the mods is a good idea.

 

[Brian Cherrick]

if I add the mods in the launcher, and start the game, will the launcher automatically sort the conflicts out?

Typically there are very few Id conflicts since they were done away with in 1.7, but certain things still have them. For example when I added reikas mods, I had to resolve a potion if conflict. Stuff like that doesn't automatically sort, but if/when the pack crashes when launching, it does show what caused it in the crash log. They're usually easy to fix, but if you are uncomfortable, you can always ask for help.

As has been said, always backup your world. If you remove a mod, all items you have for that mod disappear.

I made a kitchensink pack of sorts I based off of DW20, if you want to take a gander at it, I can pm you when I get home from work

 

[Inifus]

Thank you! there were no id conflicts in this case. I will have to supply everyone on my server with the added mods. but that should be no biggie as it is only me and another at the moment

 

[GreenZombie]

Thankfully, adding mods to an existing modpack is much easier since 1.7.x as item-ids are now assigned dynamically - although the potential for catastrophe is still there should you do something like remove a mod.

What you really need to watch for are conflicts in
* dimension id
* potion id
* biome id

As these typically will not be obvious immediately but will cause no end of strife and headache later as players start to delve deeper into the mods content. (Do not EVER for example think that you could simply add Ars Magica to Direwolf20)

So, do your due dilligence - before modifying your live server always examine the created config of any new mods to see if it defines any ids, then check your existing server using NEI's id dump feature to double check that the slots allocated were not previously used by something else, and ensure that you only ever load your live world with config that you have pre-adjusted to resolve conflicts. You don't EVER want to have a world that has been loaded with two different sets of these ids as it will very likely result in unresolvable crashes when areas of the map are visited.

 

[Inifus]

how would one use this id dump feature in NEI?

 

[GreenZombie]

how would one use this id dump feature in NEI?

If you open your inventory, and click on the "Options" button in the bottom left of the screen, you open NEI's options screen. Here, under Global Options (iirc) you should fine a menu option called "Dump Ids" or something similar. This in turn will open a screen asking which specific ids' you want to dump, items, potions, dimensions etc.

Selecting an option will cause NEI to write out a text file to your Minecraft / FTB launcher profile folder for the pack you are playing - if you are making modpacks you should know where to find it

 

[Inifus]

Thank you!

thankfully neither of the two mods I added do not add new dimensions or biomes but this information will help me a great deal when I device do customize the modpack further