Plutonium

The graph seems to indicate ~50 packets/s. Where is 10hz coming from?

Hey, thanks for this, I sequentially went through your suggestions. None have completely solved the issue. I noticed though that after renaming Plutonium/storage/iw5/zone the plutonium client reinstalled those files for me, after that, the map rotation sometimes works, but still sometimes doesn't. The other suggestions didn't work, except Windows, unfortunately I don't have a windows install to try this on.

Do you have any other suggestions i could try or do you know how I can get some more verbose logs?

Hi all,

I’m running into a strange issue on MW3 (Plutonium IW5) and I’m trying to understand what’s actually going on under the hood.

Symptoms

• When a server rotates to a new map (e.g. mp_alpha / Lockdown), the game errors with:

  Could not load map "mp_alpha" because the fastfile for the map is not installed on your system.
  

  and disconnects / crashes.

This happens for most if not all maps, not just Lockdown.

• However:

  • I can join the same server while it’s already running that map just fine
  • I can play the map in private match with no issues

So the fastfile is clearly present and loadable. The failure only happens during map rotation within a lobby.

I purchased and downloaded the game and all DLC officially via Steam

---

What I’ve Checked

• mp_alpha.ff exists and is readable

• Also present:

  mp_alpha_load.ff
  

• No missing files according to logs (outside of the generic error message)

---

Observed Behavior

• Cold join: works
• Private match: works
• Map rotation: fails with “fastfile not installed”

This suggests:

• The issue is not filesystem access
• The issue is not missing files
• The failure is specific to the rotation / map change path

---

Map directory contents

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Steam/steamapps/common/Call of Duty Modern Warfare 3/zone/dlc

mp_aground_ss.ff
mp_aground_ss_load.ff
mp_boardwalk.ff
mp_boardwalk_load.ff
mp_burn_ss.ff
mp_burn_ss_load.ff
mp_cement.ff
mp_cement_load.ff
mp_courtyard_ss.ff
mp_courtyard_ss_load.ff
mp_crosswalk_ss.ff
mp_crosswalk_ss_load.ff
mp_hillside_ss.ff
mp_hillside_ss_load.ff
mp_italy.ff
mp_italy_load.ff
mp_meteora.ff
mp_meteora_load.ff
mp_moab.ff
mp_moab_load.ff
mp_morningwood.ff
mp_morningwood_load.ff
mp_nola.ff
mp_nola_load.ff
mp_overwatch.ff
mp_overwatch_load.ff
mp_park.ff
mp_park_load.ff
mp_qadeem.ff
mp_qadeem_load.ff
mp_restrepo_ss.ff
mp_restrepo_ss_load.ff
mp_roughneck.ff
mp_roughneck_load.ff
mp_shipbreaker.ff
mp_shipbreaker_load.ff
mp_six_ss.ff
mp_six_ss_load.ff
mp_terminal_cls.ff
mp_terminal_cls_load.ff

so_survival_mp_*.ff (boardwalk, cement, italy, meteora, moab, morningwood, nola, overwatch, park, qadeem, roughneck, shipbreaker, terminal_cls)

patch_mp_*.ff (matching many of the above maps)

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Steam/steamapps/common/Call of Duty Modern Warfare 3/zone/english

Campaign:
berlin.ff
castle.ff
dubai.ff
hamburg.ff
(...etc)

Multiplayer:
mp_alpha.ff
mp_alpha_load.ff
mp_bootleg.ff
mp_bootleg_load.ff
mp_bravo.ff
mp_bravo_load.ff
mp_carbon.ff
mp_carbon_load.ff
mp_dome.ff
mp_dome_load.ff
mp_exchange.ff
mp_exchange_load.ff
mp_hardhat.ff
mp_hardhat_load.ff
mp_interchange.ff
mp_interchange_load.ff
mp_lambeth.ff
mp_lambeth_load.ff
mp_mogadishu.ff
mp_mogadishu_load.ff
mp_paris.ff
mp_paris_load.ff
mp_plaza2.ff
mp_plaza2_load.ff
mp_radar.ff
mp_radar_load.ff
mp_seatown.ff
mp_seatown_load.ff
mp_underground.ff
mp_underground_load.ff
mp_village.ff
mp_village_load.ff

Spec Ops / Survival:
so_assassin_payback.ff
so_assault_rescue_2.ff
so_deltacamp.ff
so_heliswitch_berlin.ff
so_ied_berlin.ff
(...etc)

so_survival_mp_*.ff (alpha, bootleg, bravo, carbon, dome, exchange, hardhat, interchange, lambeth, mogadishu, paris, plaza2, radar, seatown, underground, village)

Core:
common.ff
common_mp.ff
common_specialops.ff
common_survival.ff
code_pre_gfx.ff
code_pre_gfx_mp.ff
code_post_gfx.ff
code_post_gfx_mp.ff
localized_code_post_gfx_mp.ff
localized_code_pre_gfx_mp.ff
localized_common_mp.ff
localized_ui_mp.ff
ui.ff
ui_mp.ff

Patch:
patch.ff
patch_mp.ff
patch_sp_*.ff
patch_mp_*.ff
patch_so_*.ff
patch_survival.ff

---

AppData/Local/Plutonium/storage/iw5/zone

Spec Ops (core):
dam_specops.ff
dubai_specops.ff
(...etc)

Spec Ops missions:
so_coop_vlad_ep01.ff
so_demolition_slava_hunt.ff
so_escape_hamburg.ff
so_escape_rescue_2_so.ff
(...etc)

Localized Spec Ops:
[english, french, german, italian, japanese, polish, russian, spanish]
→ each includes:
   so_coop_vlad_ep01.ff
   so_demolition_slava_hunt.ff
   so_escape_hamburg.ff
   (...etc)

Multiplayer:
mp_aground_ss.ff
mp_boardwalk.ff
mp_burn_ss.ff
mp_cement.ff
mp_courtyard_ss.ff
mp_crosswalk_ss.ff
mp_hillside_ss.ff
mp_italy.ff
mp_meteora.ff
mp_moab.ff
mp_morningwood.ff
mp_nola.ff
mp_overwatch.ff
mp_park.ff
mp_qadeem.ff
mp_restrepo_ss.ff
mp_roughneck.ff
mp_shipbreaker.ff
mp_six_ss.ff
mp_terminal_cls.ff

Load files:
mp_*_load.ff (present for all multiplayer maps above)

Survival:
so_survival_mp_boardwalk.ff
so_survival_mp_cement.ff
so_survival_mp_italy.ff
so_survival_mp_meteora.ff
so_survival_mp_moab.ff
(...etc)

---

Environment

• MW3 via Steam
• Plutonium IW5
• Running under Wine/Proton (CachyOS Linux)

---

If anyone familiar with the engine internals or Plutonium’s filesystem/zone handling could clarify this, I’d really appreciate it.

Thanks!