When loading my save game, this error message pops up:

Model Load Error: Meshes\c\C_M_Black_Robe_03b.nif cannot load file in Meshes\c\C_M_Black_Robe_03b.nif.

Does anyone know what mod that mesh is from, so that I can fix it?

C_M Is usually referring to Cutthroat mods(I'm pretty sure), which makes it that huge Companion mod they have (forgot the name). CM Partners? Other abbreviations include my own "C_M(ireneye)" that one may think but i name my meshes using "mir_" so it's obviously not mine.

That's odd...I did install the CM partners mod, but I'm not running it *shrugs*
Here is my load list, should have posted it before...D'oh!
[Game Files]
GameFile0=abotWaterLife.esm
GameFile1=Aduls_Master_Mod.esm
GameFile2=Bloodmoon.esm
GameFile3=Havish.esm
GameFile4=Hilgya the Seamstress.esm
GameFile5=Morrowind Patch v1.6.4.esm
GameFile6=Morrowind.esm
GameFile7=RillerMosh BETA 2.2.esm
GameFile8=Siege at Firemoth Fort.esm
GameFile9=Texture Fix - Bloodmoon 1.1.esm
GameFile10=The Undead.esm
GameFile11=Tribunal.esm
GameFile12=TR_Data.esm
GameFile13=TR_Map1.esm
GameFile14=TR_Map2.esm
GameFile15=A Hermit's Request.esp
GameFile16=abotWaterLifeTRaddon.esp
GameFile17=adamantiumarmor.esp
GameFile18=Aduls_Arcane_Armature.esp
GameFile19=Aduls_Leggings.esp
GameFile20=Aduls_Leggings_Bloodmoon.esp
GameFile21=Aduls_Leggings_Tribunal.esp
GameFile22=Alakazar's Lamp_no_music.esp
GameFile23=almalexia armor.esp
GameFile24=Amulet of Scrye.esp
GameFile25=Animal Behaviour.esp
GameFile26=Animated Morrowind 1.0.esp
GameFile27=Apostates of Oblivion_2.1.esp
GameFile28=Appropriate Greetings M - T - 1.5.2.esp
GameFile29=AreaEffectArrows.esp
GameFile30=Art Of War Museum (Arms&Armor).esp
GameFile31=AscendedSleeperSFX.esp
GameFile32=Atronach Expansion X.ESP
GameFile33=Barabus' fireplaces 2.esp
GameFile34=BB Dark Brotherhood by Westly.esp
GameFile35=bcsounds.esp
GameFile36=Better Bodies.esp
GameFile37=Better Clothes_v1.1.esp
GameFile38=Better Propylons MI.ESP
GameFile39=Better Skulls.ESP
GameFile40=BetterClothesForTB.esp
GameFile41=BH_Argonians.esp
GameFile42=BH_DarkElves.esp
GameFile43=BH_Imperials_M.esp
GameFile44=BH_WoodElves_F.esp
GameFile45=BH_WoodElves_M.esp
GameFile46=blackhoodedrobesbykalikut.esp
GameFile47=Blight Bounties.esp
GameFile48=Bloated Caves.esp
GameFile49=BM-Fixes.esp
GameFile50=bones.esp
GameFile51=Books of Vvardenfell_2.0.esp
GameFile52=Cali's_BB_V.2_Dryad_Dresses.esp
GameFile53=Caves of the bitter coast v 1.1.ESP
GameFile54=CB-illusionbolt1.0.esp
GameFile55=Chalk30-Base.esp
GameFile56=Clean Aduls_Arsenal.esp
GameFile57=Clean Aduls_Leggings.esp
GameFile58=Clean Aln'Baldrahn.esp
GameFile59=Clean Better Daedric.esp
GameFile60=Clean Deepest Chasm1.1.esp
GameFile61=Clean Lights_300_V4.esp
GameFile62=Clean Overrun Dagoth Ur Facility v1.esp
GameFile63=Clean Welcome to the Arena!.ESP
GameFile64=Clean_Templar_Pauldron_Fix_v11.esp
GameFile65=Creatures Great House Dagoth Patch.esp
GameFile66=Creatures.esp
GameFile67=Dagger of Symmachus.esp
GameFile68=DagonFel_Well_v2.esp
GameFile69=DN_AshVampires.esp
GameFile70=Dracus's Durzog Armor Tribumal V1.1.esp
GameFile71=Dragonbone Armor [v.1.2].esp
GameFile72=Dulsya Isle.esp
GameFile73=Dwarven creatures.esp
GameFile74=Dwarven Spectre Additions.esp
GameFile75=EBQ_Artifact.esp
GameFile76=EmmasKhuul.esp
GameFile77=entertainers.esp
GameFile78=Exotic Imports by Westly.esp
GameFile79=Expanded Sounds.esp
GameFile80=farrp_Quivers-FletchingKit_V2-5.esp
GameFile81=Fligg's Slave Mod.esp
GameFile82=Frost_atronach_solsthiem.esp
GameFile83=Glowing_Mines.ESP
GameFile84=Go To Jail 3.5 - T B.esp
GameFile85=Great House Dagoth ( Master Index Compatibility ).esp
GameFile86=Great House Dagoth.esp
GameFile87=Greater Undead.esp
GameFile88=Haunted Tombs v1.06.esp
GameFile89=Havish Mini Patch.esp
GameFile90=Healers.esp
GameFile91=Hilgya the Seamstress Expansion 1.esp
GameFile92=HospitalityPapers.esp
GameFile93=IceNioLivRobeReplacerALL.esp
GameFile94=Illuminated Order v1.0 - Bloodmoon Compatibility Extras.esp
GameFile95=Illuminated Order v1.0.esp
GameFile96=Key Replacer Trib & BM.esp
GameFile97=KirkbrideBooks.esp
GameFile98=Kn-PowerToThePeople.esp
GameFile99=KS_Julan_Ashlander Companion_1.3.esp
GameFile100=LeFemmArmor.esp
GameFile101=LeftGloves.esp
GameFile102=Less_Generic_Bloodmoon.esp
GameFile103=Less_Generic_Nerevarine.esp
GameFile104=Less_Generic_Tribunal.esp
GameFile105=LeveledMagicka.esp
GameFile106=LGNPC_Aldruhn_v1_13.esp
GameFile107=LGNPC_AldVelothi_v1_20.esp
GameFile108=LGNPC_GnaarMok_v1_10.esp
GameFile109=LGNPC_HlaOad_v1_32.esp
GameFile110=LGNPC_Indarys_Manor_v1_45.esp
GameFile111=LGNPC_Khuul_v2_01.esp
GameFile112=LGNPC_Khuul_v2_10.esp
GameFile113=LGNPC_MaarGan_v1_11.esp
GameFile114=LGNPC_NoLore_v0_83.esp
GameFile115=LGNPC_PaxRedoran_v1_12.esp
GameFile116=LGNPC_Pelagiad_v1_13.esp
GameFile117=LGNPC_Pelagiad_v1_21.esp
GameFile118=LGNPC_Secret_Masters_v1_21.esp
GameFile119=Lgnpc_SN.esp
GameFile120=LGNPC_SoulSicknessPatch_v1_00.esp
GameFile121=LGNPC_TelMora_v1_11.esp
GameFile122=LGNPC_TelUvirith_v1_10.esp
GameFile123=LGNPC_VivecFQ_v2_03.esp
GameFile124=LGNPC_VivecRedoran_v1_42.esp
GameFile125=MagickaRegen-v20.esp
GameFile126=Mashed Lists.esp
GameFile127=Master Thief's Privileges 1.2.esp
GameFile128=master_index.esp
GameFile129=MDP Compilation.ESP
GameFile130=MEMT_1.0.esp
GameFile131=Mer of Tamriel.ESP
GameFile132=MergedGameplayTweaks.esp
GameFile133=Minions of House Dagoth - No Undead.esp
GameFile134=More Dangerous Lava.esp
GameFile135=Naked Nerevarine.esp
GameFile136=Nasty Camonna Tong.esp
GameFile137=New Argonian Bodies - Clean.esp
GameFile138=New Khajiit Bodies - Clean.esp
GameFile139=NEWbloodmoon_begin.esp
GameFile140=NewBlood_MwTbBm1.1.esp
GameFile141=Newhead.esp
GameFile142=Nudity Greeting Expansion V1.esp
GameFile143=NV_BB_Imp_female_Armour.esp
GameFile144=NX9_liches.esp
GameFile145=Of Love and Ignorance.esp
GameFile146=P.R.E. v4.0.esp
GameFile147=PCC_Knaarus_02.esp
GameFile148=Pearls Enhanced - Colored Pearls Add-on.ESP
GameFile149=Pickpocket Fix.esp
GameFile150=Poe Lighthouse.esp
GameFile151=Redaynia Village.esp
GameFile152=ReptileInseparableSiblings.esp
GameFile153=Scripted_Spells.esp
GameFile154=Scrolls of Khartum.esp
GameFile155=SF NPC111 - Hilgya Exp1 Addon.esp
GameFile156=Silt Strider Armor - Ashlander Guards.esp
GameFile157=Sixth House Advanced 2.1.esp
GameFile158=Skooma Anonymous.esp
GameFile159=Sleep.esp
GameFile160=sm_creatures_02.esp
GameFile161=sm_DwemerStaves.esp
GameFile162=Sol-Weather Tweak.esp
GameFile163=Solstheim Sauna at Thirsk.esp
GameFile164=South Wall.ESP
GameFile165=Starfires NPC Additions ver-1.11.esp
GameFile166=Steel Broadsword Fix BM.esp
GameFile167=Telos Rin Graveyard.esp
GameFile168=The Neverhalls.esp
GameFile169=The Sable Dragon.esp
GameFile170=The Shrine of Mephala by Westly.esp
GameFile171=The Tribe Unmourned (GHD).esp
GameFile172=THTWG - Framerate Version.esp
GameFile173=TLM - Light Sources (Natural Water).esp
GameFile174=TLM - NPC Light Sources.esp
GameFile175=Tome of Spellmaking.esp
GameFile176=TravelingMerchants_v2.2.esp
GameFile177=TVwofs.esp
GameFile178=UAR_Bloodworm_v2.esp
GameFile179=UAR_ChodalaBoots.esp
GameFile180=Unboarable Rieklings.esp
GameFile181=Undeads - Skeletons Arise from Death II.esp
GameFile182=Undeads Skeletons Arise from Death.esp
GameFile183=Unique Ghosts - M - T.esp
GameFile184=UniqueFinery_NoRobe.esp
GameFile185=Vampire Realism II - BM Add-On.esp
GameFile186=Vampire Realism II.esp
GameFile187=Vvardenfell Druglord.esp
GameFile188=Wanderers of Solstheim.esp
GameFile189=Weather Effects.esp
GameFile190=WeatheredSigns.esp
GameFile191=Well.esp
GameFile192=Westly Presents_Aureals.esp
GameFile193=Westly Presents_Half Races of Tamriel_X.esp
GameFile194=Westly's Master Headpack X.esp
GameFile195=What Thieves Guild.ESP
GameFile196=wl_dockclutter.esp
GameFile197=you are being robbed 3.esp

I have it in "Minions of house dagoth.esp", so it could be "GameFile133=Minions of House Dagoth - No Undead.esp"

For these kinds of things getting hold of Wingrep or InfoRapid Search & Replace is pretty much essential.

Ah, thanks Dragon I've thankfully resolved it now.