How to Fix Roblox Error Code 601: Meaning, Root Causes & Solutions
Roblox Error Code 601 is a client-side connectivity problem with the exact client signature "Roblox Studio plugin sandboxed Lua thread exceeded maximum memory limit. (Error Code: 601)". It is primarily caused by third-party studio plugin memory leak or recursive calculation loop. and can be resolved by disable newly installed plugins via the studio plugins manager and restart studio.
| Telemetry Metric | Verified Value |
|---|---|
| Exact Client Modal String | “Roblox Studio plugin sandboxed Lua thread exceeded maximum memory limit. (Error Code: 601)” |
| Diagnostic Fault Classification | Client-Side (Local Network / Device Fixable) |
| Affected Executables & Binaries | RobloxStudioBeta.exe |
| Fastest 60-Second Resolution | Disable newly installed plugins via the Studio Plugins Manager and restart Studio. |
| Last Tested Client Build Hash | version-9d1a3b4c8e2f01aa |
| Official Documentation Citation | Official Roblox Help Center Citation → |
Instant 60-Second Quick Resolution Protocol
Roblox Error Code 601 occurs in Roblox Studio when an installed third-party plugin creates an infinite Luau execution loop or leaks heap memory past the sandbox quota.
%localappdata%\Roblox\PluginsWhy Roblox Error Code 601 Happens (Client Crash & Memory)
Roblox Error Code 601 occurs when third-party studio plugin memory leak or recursive calculation loop. In technical terms, the client engine logs indicate that packet exchanges fail during the synchronization phase, triggering the modal message: “Roblox Studio plugin sandboxed Lua thread exceeded maximum memory limit. (Error Code: 601)”.
Roblox Client Telemetry Log Signature:
[FLog::Studio] PluginManager: Plugin thread killed due to sandboxed memory limit exceeded
How to Fix Roblox Error Code 601 on Windows 10 & 11
Execute these verified steps in sequence on Windows PCs to resolve Error Code 601:
Step 1: Disable Suspect Plugins via Plugins Folder
1350 SolvedOpen Roblox Studio -> Plugins tab -> Manage Plugins. Disable recently updated plugins one by one to identify the source of the memory leak.
%localappdata%\Roblox\PluginsHow to Fix Roblox Error Code 601 on macOS and Mobile
Option 1: Disable Suspect Plugins via Plugins Folder
Open Roblox Studio -> Plugins tab -> Manage Plugins. Disable recently updated plugins one by one to identify the source of the memory leak.
%localappdata%\Roblox\Plugins