Creature "_ACD_PracticeD_B00000000" has no animation groups.
Morrowind will crash!
Actor Animation problem with "_ACD_PracticeD_B00000000".
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GameFile0=Aduls_Master_Mod.esm
GameFile1=Assassins Armory.esm
GameFile2=Better Heads Bloodmoon addon.esm
GameFile3=Better Heads Tribunal addon.esm
GameFile4=Better Heads.esm
GameFile5=Bloodmoon.esm
GameFile6=CastleWars.esm
GameFile7=GDR_MasterFile.esm
GameFile8=Havish.esm
GameFile9=Hilgya the Seamstress.esm
GameFile10=Morrowind.esm
GameFile11=Siege at Firemoth Fort.esm
GameFile12=Tribunal.esm
GameFile13=Wizards Islands - Scourge of the Frost Bringer.esm
GameFile14=￡exa's Dwemer Alchemy V2 (EN).esm
GameFile15=62 Exquisite Robe -- v1.1.esp
GameFile16=A Hermit's Request.esp
GameFile17=A Strange Death.esp
GameFile18=abotGuars.esp
GameFile19=Aduls_Arcane_Armature.esp
GameFile20=Aduls_Arsenal.esp
GameFile21=Aduls_Suran_Dwelling_Revised.esp
GameFile22=Adventure's End.esp
GameFile23=Agent's Solitude.esp
GameFile24=Albaniar Prison.ESP
GameFile25=Albecius's Axe.esp
GameFile26=Ald Redaynia Extended.esp
GameFile27=AldVelothi-ShipMaster.esp
GameFile28=Amulets and Rings 2.1 Upgrade A.esp
GameFile29=An Adventurer's Tale.esp
GameFile30=Andus.esp
GameFile31=Antares' Creatures - Cecaelia.esp
GameFile32=Antares' Creatures - Frost Giant.esp
GameFile33=Antares' Creatures - Treant.esp
GameFile34=Antares' Creatures - Trolls!.esp
GameFile35=ArchmagetowerTwo.esp
GameFile36=Argonian_Armor_sets.esp
GameFile37=Arkngthunch-Sturdumz Expansion - With Lights!.esp
GameFile38=Art Of War Museum.esp
GameFile39=ARTIFACTS.esp
GameFile40=Ascadian Ship Home.ESP
GameFile41=Ascadian Treehouse v-1.2a.esp
GameFile42=AshlanderTent.esp
GameFile43=Assasins Attack! V1.1.esp
GameFile44=Assassins Armory - Bolt Rifles.esp
GameFile45=Assassins Armory - Unofficial Patch 7.7.esp
GameFile46=Atronach Expansion X.ESP
GameFile47=Balmora Ragoxified.ESP
GameFile48=Balmora University V2.01.ESP
GameFile49=Bandit_Hideout.esp
GameFile50=BARBARIAN.ESP
GameFile51=BarbarianHarderAddOn.ESP
GameFile52=bbsailorfuku2.5.esp
GameFile53=Better Bodies.esp
GameFile54=Better Heads Bloodmoon addon.esp
GameFile55=Better Heads Tribunal addon.esp
GameFile56=Better Heads.esp
GameFile57=BE_dh_homes.esp
GameFile58=BE_HousesForSale.esp
GameFile59=BE_The Soothsayer ver 1.1.esp
GameFile60=Big Paulds.ESP
GameFile61=Black Glass.esp
GameFile62=Blasphemous Revenants.esp
GameFile63=Bloodmoon_Creatures.esp
GameFile64=BM-Fixes.esp
GameFile65=Bridgewater Blacksmith 1.1.esp
GameFile66=BR_Werewolf_Patch.esp
GameFile67=Cali's Kitchen.V2.esp
GameFile68=CastleWars - Updates.ESP
GameFile69=Chascoda's Armored Dresses.esp
GameFile70=Chascoda's Java Shop.esp
GameFile71=Clean Balmora Undercity.esp
GameFile72=Clean jac_bearcub.ESP
GameFile73=Clean Smithy_Inn.ESP
GameFile74=Clean_D-Blade(V1.0).esp
GameFile75=Clean_magicka_enchantments.esp
GameFile76=cliffracer_armor_v.1.0_m.esp
GameFile77=ColovianFurGauntlets-BM.esp
GameFile78=Crusaders_of_Tamriel.esp
GameFile79=Daedric Lords Enchanted Island.ESP
GameFile80=DagonFel Mill V-1.8 esp..esp
GameFile81=dagoth_ur_mask.esp
GameFile82=Dahrk Creatures I.ESP
GameFile83=Dark_Dwemer_Armor.ESP
GameFile84=DA_ArkFrzanch_Ruins.ESP
GameFile85=Death's Visi.ESP
GameFile86=Deus Ex Machina - A Steampunkyish Mod.ESP
GameFile87=dracandrosvoice.esp
GameFile88=DreadKnight.ESP
GameFile89=Dulsya Isle.esp
GameFile90=Dungeons 1.esp
GameFile91=Dungeons, Chapter 2.esp
GameFile92=Dungeons, Chapter 3.esp
GameFile93=Dungeons, Chapter 4.ESP
GameFile94=Dwemer Alchemy Set (1.00 R3).esp
GameFile95=Ebonheart, Shack Town.esp
GameFile96=Enchanted Weapon Variety ME.esp
GameFile97=Enchanted Weapon Variety PTE Patch.esp
GameFile98=energy_swordv6.esp
GameFile99=Erengard Mines.esp
GameFile100=EverScrolls.esp
GameFile101=Evil Eye - Dark Robe v1-5.esp
GameFile102=Extra Trader.esp
GameFile103=Extra_Artifacts.esp
GameFile104=Fantasy Race Pack.ESP
GameFile105=FFX Swords.esp
GameFile106=fkoa.esp
GameFile107=flying_broom.esp
GameFile108=Frostmoth Docks.ESP
GameFile109=FRP and CW compatibility patch.ESP
GameFile110=fw_malcha_v5.0.esp
GameFile111=Geonox_W_W_Pack_01.esp
GameFile112=Ghorak Manor Updated Tribunal.ESP
GameFile113=GothicLolitaDresses FINAL.esp
GameFile114=Havish - Scimitar Update (no MWE).esp
GameFile115=Havish Mini Patch.esp
GameFile116=Heart of Tamriel 1, The Ship.ESP
GameFile117=Heralders.ESP
GameFile118=HHS.esp
GameFile119=Hirstaang Abode v1.esp
GameFile120=Hirstaang Mill V 1.2Q.esp
GameFile121=Hlaalu Home.ESP
GameFile122=Imperial Cart Travel.esp
GameFile123=Import Business; the Merchant of Vvardenfell.esp
GameFile124=Indarys Unleashed.esp
GameFile125=INDYBANK.ESP
GameFile126=indybankWC.esp
GameFile127=IronManPrototype.esp
GameFile128=Ixtaxh Sewers.ESP
GameFile129=JAC_Jasmine.esp
GameFile130=Javelin's.esp
GameFile131=JWs_Seyda_Neen_Rochndil_Remix_11.esp
GameFile132=k7_arcane_archery.ESP
GameFile133=Khuul Expansion 1.2.esp
GameFile134=KS_Katisha's_Fancy_Threads_1.0.esp
GameFile135=kwama_armor.esp
GameFile136=Legend of Akheed.esp
GameFile137=Leggings for Ultimate Knight Shop.esp
GameFile138=Lich Father Act I.esp
GameFile139=Lich Father Act II.esp
GameFile140=Maar_Gan_Supplies.esp
GameFile141=MadachRoom.ESP
GameFile142=Magical Missile Ammo Mod_3.9.esp
GameFile143=MalSoft's Forces of Oblivion.ESP
GameFile144=marcMoriEstate.esp
GameFile145=Markhonen's Lair.esp
GameFile146=master_chief.esp
GameFile147=MA_berserk_potion.ESP
GameFile148=MA_nordamulets.ESP
GameFile149=MA_Somnalius_plant.esp
GameFile150=md_daedralord_staffs.ESP
GameFile151=Mechanized Minions 1.6.esp
GameFile152=Merchant_Hideout.esp
GameFile153=Merged_Dialogs.esp
GameFile154=Merged_Leveled_Lists.esp
GameFile155=Merged_Objects.esp
GameFile156=Meskoa_particle_weapons_1.0_EV.esp
GameFile157=Meskoa_Weapon_pack_1.0_EV.esp
GameFile158=missing_gems.esp
GameFile159=MistyQuiver.esp
GameFile160=MistysTigerOutfit.esp
GameFile161=MNC_Ald-ruhn_ v1.1_EV.esp
GameFile162=Moon Sugar Plantation.esp
GameFile163=Morag Tong - Methas.esp
GameFile164=More Creatures Leveled v1.2.esp
GameFile165=Na'vi Bow and Arrow.esp
GameFile166=Necromancy Realism.esp
GameFile167=New Corprus Stalker.esp
GameFile168=New NPCs Balmora 1.ESP
GameFile169=NG_New_Carnithus'_Armamentarium.esp
GameFile170=Nightveil.esp
GameFile171=Northern Winds V1.1.esp
GameFile172=Note to Hrisskar.esp
GameFile173=NX9_Guards_Complete.ESP
GameFile174=Object_Duality.ESP
GameFile175=Oblivion Fort.esp
GameFile176=Of Justice and Innocence.esp
GameFile177=PB_Dagoth_Bonemold.esp
GameFile178=Pearls Enhanced - Colored Pearls Add-on.ESP
GameFile179=Pegas Horse Ranch v3.1.esp
GameFile180=Pelagiad Greenhouse.esp
GameFile181=Pelagiad Provisions v1.3.esp
GameFile182=Plaza Brindisi Quest.ESP
GameFile183=Port Hamvirr OV.ESP
GameFile184=Propylons Expanded.esp
GameFile185=Protective Guards.esp
GameFile186=Puzzle Halls ver 2.0.esp
GameFile187=Pyjamarama Narissa's Boudoir - v1.1.esp
GameFile188=RADD Artifacts.ESP
GameFile189=Rat's Bow & Quiver.esp
GameFile190=Real_Katanas_For_Sale_v1_1.esp
GameFile191=Redaynia Village.esp
GameFile192=Retex G.A.esp
GameFile193=Riverside Manor V2.5.esp
GameFile194=Robe_Crowswrath.esp
GameFile195=RR+BH.ESP
GameFile196=Ruby Weapons.ESP
GameFile197=Ruins of Serpenthold.esp
GameFile198=Samarys Expanded.esp
GameFile199=Sapphire Weapons V 1.ESP
GameFile200=Scamp Lord - Doppleganger 2.5.esp
GameFile201=Scripted_Spells.esp
GameFile202=Season of the Harvest v1.1.esp
GameFile203=Sentinel-V-1.5.esp
GameFile204=Serenity Island 2009.esp
GameFile205=SG-BB-for-beasts.esp
GameFile206=Silt Strider Armor - Ashlander Guards.ESP
GameFile207=Sins Of Our Fathers.ESP
GameFile208=SMRebuild.ESP
GameFile209=sm_ForgottenHalls.esp
GameFile210=Spot_of_Tea.esp
GameFile211=steam_guardian_helm.esp
GameFile212=Suran Waterfront V-5.1.esp
GameFile213=TarMar.esp
GameFile214=Taz's Wonderful World.ESP
GameFile215=The Broomstick Shop.esp
GameFile216=The Mysterious Merchant, Seyda Neen.esp
GameFile217=The Neverhalls.esp
GameFile218=The Quixinite.esp
GameFile219=The Raven.esp
GameFile220=The Sable Dragon 1.6.esp
GameFile221=The Ultimate Knight Shop.esp
GameFile222=TheLodge-2.esp
GameFile223=The_Swords_of_Morrowind.esp
GameFile224=THE_UNDERGROUND_2b.esp
GameFile225=The_Vvardenfell_Libraries.esp
GameFile226=THTWG - Harder Version.esp
GameFile227=Tomb Of Horrors V.2.0.esp
GameFile228=town_of_uvirith.esp
GameFile229=TreasureHunt.esp
GameFile230=TreasureHuntII.esp
GameFile231=Tribunal Order.ESP
GameFile232=Trouble_at_Sea.esp
GameFile233=Undead - Mummies Arise from Death.esp
GameFile234=Undeads - Skeletons Arise from Death II.esp
GameFile235=Undeads Skeletons Arise from Death.esp
GameFile236=Ushindra Beach v1.2.esp
GameFile237=Uvirith's Legacy_Final_2.0.esp
GameFile238=Vampiric Citadel & New Armors v1.1.esp
GameFile239=VampRing-1.6.esp
GameFile240=VFX Weapons- Undead Blade Special Effect.esp
GameFile241=Vivec Expansion 2.0.esp
GameFile242=Vivec_Trader.esp
GameFile243=WAS.esp
GameFile244=Westly_Presents_FCOT.esp
GameFile245=Winters Court.esp
GameFile246=Wizard's Rest.esp
GameFile247=Wizards_Islands_SotFB_Patch.esp
GameFile248=W_Pelagiad Townhouse.esp
GameFile249=W_Vos Apartment.esp
GameFile250=XXN Argony Armor.esp
GameFile251=Yautja_wristblade.esp
GameFile252=Z4K_Giants_AddToLev_Patch.esp
GameFile253=GIANTS.esm
GameFile254=GIANTS Ultimate Control file.esp

Also i have MGEgui enabled, if it matters.

This.

Use MGEgui only to set options for MGE. Do not run it during the game. I believe that MGE's documentation states that, though I may be a bit out of the loop.

Even if it doesn't solve that specific problem, it will prevent others.

But, you must be using a mod that incorporates Acidbasick's dummies into your game.

PM
If you are familiar with any other searching tool (total commander, agent ransack...), use it, else use standard Windows search, things to search are the same
- right click the Morrowind\Data Files folder
- choose search (or find, I don't have english version of Windows installed)
- in the search options, choose *.es? as file name and _ACD_PracticeD_ as text to search inside the files
you should be able to find mod(s) containing a reference to that practice dummy

I'm sorry if i have made it not exactly clear - the MGEgui.exe is not running while i play (it is actually not possible, there's some hidden safeguard in the program that prevents it) - i just meant that i use this applications provided graphical enchantments.

I note that you're using a "Merged_Dialogs.esp". That's unfortunately a bad sign (usually) - this file gets created by TESTool, either by specifically lmerging dialogue or by pressing the evil "Just Fix It" button. If you pressed that button, then there's a good chance that several plugins are broken now and it might be difficult to repair them. If you didn't press that button, then just remove the "Merged_Dialogs.esp", it tends to cause more trouble than it's worth.

For now it has only made dialogs to load longer, which i don't much.