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Modding Guide
PalMods
FrameworkPalworld 1.0Intermediate

UE4SS: Install, Verify & Maintain

Updated

Use the Workshop build when possible, understand the supported manual fallback, verify the live log, and avoid the duplicate-loader crash that catches returning players.

15 min read Researched for 1.0 Sources included

UE4SS is the native runtime behind Palworld Lua mods and LogicMods, and it is also a dependency for PalSchema. In Palworld 1.0, the official loader can deploy a UE4SS core package from Workshop. That is the cleanest player setup because the package can declare dependencies and Palworld controls the runtime deployment.

A manual UE4SS install remains useful for framework development, a release explicitly built for WinGDK, or a toolchain whose maintainer requires a particular experimental build. UE4SS is version-sensitive: use the exact build named by the Palworld mod or framework, not simply the newest archive on a release page.

01At a glance

Workshop or manual?

Use caseChooseReason
Steam player using published modsWorkshop UE4SS dependencyOfficial deployment, dependency tracking, updates, and Mod Management.
PalSchema userThe exact UE4SS build PalSchema documentsPalSchema development and stable releases can target a specific Palworld UE4SS build.
Lua author debugging locallyManual development runtimeDirect config, console/log access, hot reload, and reproducible files.
Game Pass PCOnly a WinGDK-specific community buildThe Steam Workshop loader does not support the WinGDK client.
Windows dedicated serverOfficial server package with UE4SS InstallRuleServer loader deploys native UE4SS under its controlled runtime tree.
02Recommended for Steam

Install UE4SS through Workshop

  1. 01

    Remove an old manual core

    Back up any authoring configuration you need, then remove the previous proxy DLL and runtime files. Do not leave a manual dwmapi.dll beside a Workshop UE4SS deployment.

  2. 02

    Subscribe through the dependent mod

    Use the mod’s Required Items panel or Subscribe to all so you receive the UE4SS package its author tested.

  3. 03

    Enable the dependency

    Open Options → Mod Management, confirm UE4SS and the dependent mod are both enabled, and resolve any missing-dependency warning.

  4. 04

    Save and restart

    Allow Palworld to restart. The official loader validates the package, deploys the UE4SS core, then places dependent Lua or LogicMods in their runtime locations.

  5. 05

    Generate a fresh log

    Launch once, exit normally, and inspect the new UE4SS.log. Look for the runtime version and the dependent mod being discovered without fatal errors.

03Manual path

Manual UE4SS runtime location

<Palworld folder>/Pal/Binaries/Win64

Manual fallback only. Use the build and proxy DLL documented for your exact Palworld distribution; Workshop is preferred on Steam.

04Verification

Prove that UE4SS really loaded

  • The log is from this launch

    Archive the previous UE4SS.log, launch once, and confirm a new timestamped session was written.

  • The runtime identifies itself

    The opening lines show a UE4SS version and initialization rather than ending at proxy attachment.

  • Mods are discovered

    Your target Lua, LogicMod, or PalSchema dependency appears in the fresh log.

  • No fatal object or signature failure

    Version mismatch errors, missing signatures, or repeated access violations usually require a compatible runtime—not another copy operation.

  • The documented in-game effect occurs

    Framework initialization is necessary but does not prove that an individual hook or data edit succeeded.

05Updates

Maintain one deliberate runtime

When Palworld updates, assume native hooks and reflected object paths may have changed until the UE4SS build and dependent mod confirm compatibility. Keep the known-good archive version, configuration, and mod list together. Updating the core without its dependents can be just as disruptive as leaving it stale.

For a clean test, disable dependent mods first and prove UE4SS alone reaches the title screen. Then restore one dependency at a time. A fresh log from that minimal state tells you far more than a log produced by a full stack of scripts, LogicMods, and data patches.

06Continue

Use the runtime

AuthoringCreate a UE4SS Lua modBuild a script, register a live hook, schedule game-thread work, and package it.DependencyInstall PalSchemaAdd the structured data-edit framework on the exact runtime it requires.RecoveryDiagnose a native crashRemove duplicate loaders, reset to a clean game, and isolate the failing layer.
07Verification

Research sources

The claims in this guide were checked against these current references. Primary sources are marked first.

Primary sourcePalworld Mod Loader — GeneralOfficial loader scope, supported package types, dependencies, client behavior, and Windows server support.Primary sourcePalworld Mod Package specificationCanonical Info.json fields, package layout, InstallRule types, version checks, and validation rules.Primary sourcePalworld Mod Loader — Technical DetailsOfficial deployment locations, version comparison, package staging, logs, and loader internals.Primary sourceUE4SS Installation GuideMaintainer installation model, proxy DLL placement, configuration, and log-based verification.Palworld Modding CommunitySteam Workshop TroubleshootingKnown duplicate-UE4SS and Workshop subscription failure modes with recovery steps.

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FAQ

Frequently asked questions

Do plain pak mods need UE4SS?

No. A resource package using the official Paks InstallRule does not inherently need UE4SS. Lua and LogicMods do; PalSchema also depends on its documented UE4SS runtime.

Should I install the newest UE4SS release?

Install the build explicitly required by the Palworld mod or framework. Native compatibility depends on the game build and the project’s Palworld-specific work, so newest is not automatically correct.

Why did Workshop UE4SS make the game crash immediately?

The common first check is a leftover manual proxy DLL or runtime. A Workshop core and manual UE4SS can load twice and collide. Remove the old manual install, verify the game, then enable only the Workshop core and one dependent mod.

Does seeing the UE4SS console prove my mod works?

It proves part of the runtime initialized. Use a fresh UE4SS.log plus the mod’s documented in-game effect to prove the specific mod loaded and executed.