Every time i try to change my pet using pet essence to one of the base game pets the game crashes.

Hmm I'm not sure why that would happen. For me personally all the base Pet Essences work normally.

What other mods do you have installed?

I have (running them i this order):
Torchlight II Essentials
Enhanced Character Creation
Full Respec

Does this problem occur with all your characters, or just one? And what kind of pet does that character(s) use?

The crashed happened on my outlander with panther when i tried to use hawk essence,and it also happened when i tried it with a ember mage (also panther).
I did the same with a outlander but the starting pet was a ferret and it worked normally.
Then i tried it with a berserker and a panther but this time instead of choosing a 6/6 appearance like with my first outlander i took 1/6 appearance so i guess the bug has to do something with appearances.

Yes, this is very strange. The problem occurs because of the new Pet models from the Xev's Pets mod. The snow leopard and lion skins for the Panther, and some colored skins for the Hammerbot will cause the game to crash when trying to use those Pet Essences.

I have no idea how to fix this, so I may just need to remove those skins unfortunately.

Hey RadViper, I wanted to let you know I tracked down what was causing that crash, and just updated Essentials with a fix.

Needless to say it was a pain in the ass tracking down all the modded skins that conflict with certain Essences (they weren't only the vanilla ones), but I think I've fixed them all.

I wasn't able to test out every different skin with every different Essence, so I may have missed some crash scenarios. If you ever get the chance, give it a try and let me know if you encounter any problems.

EDIT :: [Shortened to reduce thread clutter]

Comparisons are showing for the rings & amulets from both my character and my pet at the same time. Makes it hard to see what's what with all those little floating windows on the screen. Really happy about the update giving me a Claptrap as a pet, though! :D

Temporary fix for anyone who may be searching for this: Go back to early-game areas and find some simple rings & amulets that don't have enchants, sockets, and whatnot; at least then it's easier to see which rings are yours vs. your pet's.

Hey CTgreen, I'm guessing it's because there's now ring slots on the Pet, so it compares the ring you're looking at with 4 others (2 on your character, 2 on pet). The interface is from Pet and Fishing Overhaul, and it's definitely a little funky. I'll see if I can do anything about it.

Oh, good call. That didn't even occur to me. You're right, it's showing me the rings which my pet has (apparently auto-) equipped. No wonder I didn't recognize them; they were trash rings I told 'em to sell for me. Little punk has been hoarding jewelry! =P

Glad I spoke up, then. I'd guess a different comparison set for the pet would be more trouble than it's worth. Maybe you could just disable those jewelry items from showing up in the comparisons at all? Thanks again, and good luck.

I'm trying to use this mod to play with a friend, I have v46 installed but for some reason my friend's version is still on v45.

Oh did your friend use the direct download link? I'll update that right now, forgot to yesterday.

No, he just subscribed through the workshop. When he runs Torchlight, it doesnt update to v46.

I seem to be gaining extra skill points for some reason. Not even necessarily on level-ups, either. Seems to average about 2 per level, though.

What other mods do you have installed CTgreen?