# Programming & Scripting **URL:** https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=4 [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) **Page:** 5 --- ## [\[MVVM\] How to use "Context" CreationType properly ? ](https://forums.unrealengine.com/t/mvvm-how-to-use-context-creationtype-properly/2845766)
**Author:** [@midiphony-panda](https://forums.unrealengine.com/u/midiphony-panda)\ **Replies:** 4\ **Last updated:** [November 4, 2026, 10:23am UTC](https://forums.unrealengine.com/t/mvvm-how-to-use-context-creationtype-properly/2845766 "2026-11-04T10:23:46Z")
Hello, I’m trying to use the Context ViewModel CreationType on a child Widget Blueprint (WBP). But it never works the way I’d expect. In short, when I try to use this type in a child WBP, the ViewModel doesn’t get set … --- ## [How to deal with keyboard layouts?](https://forums.unrealengine.com/t/how-to-deal-with-keyboard-layouts/2504539)
**Author:** [@Adamen111](https://forums.unrealengine.com/u/Adamen111)\ **Replies:** 6\ **Last updated:** [November 4, 2026, 8:50am UTC](https://forums.unrealengine.com/t/how-to-deal-with-keyboard-layouts/2504539 "2026-11-04T08:50:35Z")
Keyboard Localization Issue in Unreal Engine Hello, I have an issue that’s driving me crazy, and its keyboard localization for input handling. I am a beginner in Unreal Engine (love it so far), so please go easy on me. … --- ## [Profiling Mass Representation: Native ISM vs Bulk ISM Updates vs NDC](https://forums.unrealengine.com/t/profiling-mass-representation-native-ism-vs-bulk-ism-updates-vs-ndc/2844794)
**Author:** [@pezzott1](https://forums.unrealengine.com/u/pezzott1)\ **Replies:** 3\ **Last updated:** [November 4, 2026, 5:37am UTC](https://forums.unrealengine.com/t/profiling-mass-representation-native-ism-vs-bulk-ism-updates-vs-ndc/2844794 "2026-11-04T05:37:30Z")
I’m working on a Mass-based projectile framework, with the goal of simulating and displaying large numbers of moving projectiles while keeping the CPU cost low. While profiling it, I noticed that native Mass ISM represen… --- ## [Updated to 5.8.4 from 5.8.2 and Unreal no longer opens](https://forums.unrealengine.com/t/updated-to-5-8-4-from-5-8-2-and-unreal-no-longer-opens/2849229)
**Author:** [@msjane](https://forums.unrealengine.com/u/msjane)\ **Replies:** 6\ **Last updated:** [November 4, 2026, 4:53am UTC](https://forums.unrealengine.com/t/updated-to-5-8-4-from-5-8-2-and-unreal-no-longer-opens/2849229 "2026-11-04T04:53:13Z")
I have a project in 5.8.2 which was working fine. Tonight I created a brand new project in 5.8.2. I planned to install an updated both a purchased Fab product and downloaded the 5.8.4 update of Unreal. I then discovered… --- ## [Connect real Bluetooth sensors to your Unreal Engine game. The Bluetooth Plugin is now available on Fab!](https://forums.unrealengine.com/t/connect-real-bluetooth-sensors-to-your-unreal-engine-game-the-bluetooth-plugin-is-now-available-on-fab/2849682)
**Author:** [@Basilisk\_Lab](https://forums.unrealengine.com/u/Basilisk_Lab)\ **Replies:** 0\ **Last updated:** [November 4, 2026, 4:28am UTC](https://forums.unrealengine.com/t/connect-real-bluetooth-sensors-to-your-unreal-engine-game-the-bluetooth-plugin-is-now-available-on-fab/2849682 "2026-11-04T04:28:41Z")
Bluetooth Framework for Unreal Engine is now available on Fab. Bluetooth and BLE in Unreal have always meant fighting low-level callbacks and hand-writing Win32 calls. Today, Basilisk Lab is releasing the plugin that ma… --- ## [Ima Looking for a experienced Technical Partner, Not A Yes Man Or Woman Someone Who Will challenge My Ideas About the Game it self, ](https://forums.unrealengine.com/t/ima-looking-for-a-experienced-technical-partner-not-a-yes-man-or-woman-someone-who-will-challenge-my-ideas-about-the-game-it-self/2849614)
**Author:** [@Creator\_Cosmic](https://forums.unrealengine.com/u/Creator_Cosmic)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 9:41pm UTC](https://forums.unrealengine.com/t/ima-looking-for-a-experienced-technical-partner-not-a-yes-man-or-woman-someone-who-will-challenge-my-ideas-about-the-game-it-self/2849614 "2026-11-03T21:41:34Z")
Welcome to COSMIC VOID :milky\_way: Welcome to the official community for COSMIC VOID, an original supernatural fantasy action RPG currently in development. This is where the world of COSMIC VOID comes to life. Explore … --- ## [Missing Classes, Assets, Verse Errors & Crashes ](https://forums.unrealengine.com/t/missing-classes-assets-verse-errors-crashes/2849558)
**Author:** [@Hamdawi320](https://forums.unrealengine.com/u/Hamdawi320)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 5:52pm UTC](https://forums.unrealengine.com/t/missing-classes-assets-verse-errors-crashes/2849558 "2026-11-03T17:52:52Z")
Subject: URGENT – UEFN 43.00 Broke My Project (Missing Classes, Assets, Verse Errors & Crashes) Hello Epic Games Support, I’m experiencing a critical issue with my UEFN project CLIMBING FOR BRAINROT after updating For… --- ## [Day 1 - Building My Own DirectX 12 Game Engine From Scratch](https://forums.unrealengine.com/t/day-1-building-my-own-directx-12-game-engine-from-scratch/2849557)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 5:52pm UTC](https://forums.unrealengine.com/t/day-1-building-my-own-directx-12-game-engine-from-scratch/2849557 "2026-11-03T17:52:46Z")
Hello everyone, Alongside my Unreal Engine 5 Gameplay Engineer journey, I have started a second long-term project: building my own game engine from scratch using C++ and DirectX 12. Day 1 is now complete. Current prog… --- ## [After i load in the match it keeps me in for 30 seconds then it sends me back to lobby and this pops up ](https://forums.unrealengine.com/t/after-i-load-in-the-match-it-keeps-me-in-for-30-seconds-then-it-sends-me-back-to-lobby-and-this-pops-up/2849518)
**Author:** [@ss1r3x](https://forums.unrealengine.com/u/ss1r3x)\ **Replies:** 1\ **Last updated:** [November 3, 2026, 5:21pm UTC](https://forums.unrealengine.com/t/after-i-load-in-the-match-it-keeps-me-in-for-30-seconds-then-it-sends-me-back-to-lobby-and-this-pops-up/2849518 "2026-11-03T17:21:01Z")
--- ## [BLANK project is not a blank project ](https://forums.unrealengine.com/t/blank-project-is-not-a-blank-project/2849520)
**Author:** [@Q1om1](https://forums.unrealengine.com/u/Q1om1)\ **Replies:** 1\ **Last updated:** [November 3, 2026, 5:17pm UTC](https://forums.unrealengine.com/t/blank-project-is-not-a-blank-project/2849520 "2026-11-03T17:17:00Z")
How is it possible that Unreal, new project can not under any circumstances not contain that incredibly annoying scene that nobody has even used for anything other than trying to figure out how to get rid of it!?!?!?!?!? … --- ## [Day 9 - Equipment System in C++ (Unreal Engine 5)](https://forums.unrealengine.com/t/day-9-equipment-system-in-c-unreal-engine-5/2849527)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 4:43pm UTC](https://forums.unrealengine.com/t/day-9-equipment-system-in-c-unreal-engine-5/2849527 "2026-11-03T16:43:47Z")
Hello everyone, I’ve just completed Day 9 of my Unreal Engine 5 Gameplay Engineer journey. Today I implemented my first Equipment System completely in C++. Features implemented: :white\_check\_mark: Equipped Item Varia… --- ## [Get batterey level of controllers in (UE5.4.4) + Meta Fork (Oculus 3s)](https://forums.unrealengine.com/t/get-batterey-level-of-controllers-in-ue5-4-4-meta-fork-oculus-3s/2849523)
**Author:** [@Nizami\_Nz](https://forums.unrealengine.com/u/Nizami_Nz)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 4:26pm UTC](https://forums.unrealengine.com/t/get-batterey-level-of-controllers-in-ue5-4-4-meta-fork-oculus-3s/2849523 "2026-11-03T16:26:56Z")
Hello, I try get batterey level of controllers in (UE5.4.4) + Meta Fork, but BatteryPercentRemaining\[2\] always return 0 #pragma once #include "CoreMinimal.h" #include "Kismet/BlueprintFunctionLibrary.h" #include "VRBat… --- ## [Is it possible to use an GPU RTX 5000 series for Learning Agents? There is a problem](https://forums.unrealengine.com/t/is-it-possible-to-use-an-gpu-rtx-5000-series-for-learning-agents-there-is-a-problem/2682865)
**Author:** [@KISLICHOK](https://forums.unrealengine.com/u/KISLICHOK)\ **Replies:** 5\ **Last updated:** [November 3, 2026, 4:25pm UTC](https://forums.unrealengine.com/t/is-it-possible-to-use-an-gpu-rtx-5000-series-for-learning-agents-there-is-a-problem/2682865 "2026-11-03T16:25:56Z")
I’m trying to run GPU training, but a standard warning about hardware incompatibility with PyTorch appears. Then there are the errors. My GPU RTX 5000 series is not supported. I tried to update, but when loading t… --- ## [How can external UEFN developers access the URC Live Testing environment? ](https://forums.unrealengine.com/t/how-can-external-uefn-developers-access-the-urc-live-testing-environment/2849516)
**Author:** [@Sectest-uefn](https://forums.unrealengine.com/u/Sectest-uefn)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 4:25pm UTC](https://forums.unrealengine.com/t/how-can-external-uefn-developers-access-the-urc-live-testing-environment/2849516 "2026-11-03T16:25:43Z")
Hello, I’m an independent UEFN developer researching Unreal Revision Control (URC) and its developer services. I found these endpoints referenced in Epic Games’ testing instructions: Production endpoint: http://urc-u… --- ## [Game's build crashing at random](https://forums.unrealengine.com/t/games-build-crashing-at-random/2849150)
**Author:** [@Dr.Clock1](https://forums.unrealengine.com/u/Dr.Clock1)\ **Replies:** 1\ **Last updated:** [November 3, 2026, 3:06pm UTC](https://forums.unrealengine.com/t/games-build-crashing-at-random/2849150 "2026-11-03T15:06:01Z")
Basically the game that I’m working on is crashing seemly at random on a specific map but only in a build and not in the editor And giving this on the logs: Fatal error! Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION… --- ## [\[Iris\] Crash for SubObject with only COND\_InitialOnly properties ](https://forums.unrealengine.com/t/iris-crash-for-subobject-with-only-cond-initialonly-properties/2570339)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 5\ **Last updated:** [November 3, 2026, 9:21am UTC](https://forums.unrealengine.com/t/iris-crash-for-subobject-with-only-cond-initialonly-properties/2570339 "2026-11-03T09:21:04Z")
Hello, we’ve run into an issue with SubObjects which only contain “InitialOnly” properties. When creating a SubObject which only contains replicating properties with the condition COND\_InitialOnly, we get a crash in FN… --- ## [Unable to serialize subobject's outer ](https://forums.unrealengine.com/t/unable-to-serialize-subobjects-outer/2543630)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 3\ **Last updated:** [November 3, 2026, 9:13am UTC](https://forums.unrealengine.com/t/unable-to-serialize-subobjects-outer/2543630 "2026-11-03T09:13:56Z")
We have a player pawn which owns a replicated components which owns a set of replicated subobjects. Sometimes those subobjects’ outers fail to resolve correctly. Rather than the replicated component, their outer is set t… --- ## [how to check when map finishes loading?](https://forums.unrealengine.com/t/how-to-check-when-map-finishes-loading/2849154)
**Author:** [@VeryClumsySloth](https://forums.unrealengine.com/u/VeryClumsySloth)\ **Replies:** 1\ **Last updated:** [November 3, 2026, 4:12am UTC](https://forums.unrealengine.com/t/how-to-check-when-map-finishes-loading/2849154 "2026-11-03T04:12:05Z")
Hi, I have a map created using World Partition. That map has a landscape, structures, and buildings. The problem is with placing the player character after loading the game. It works well when the game was saved while t… --- ## [Why is my UE 5.7 Voice Chat Audio Very Quiet and Tinny over Steam?](https://forums.unrealengine.com/t/why-is-my-ue-5-7-voice-chat-audio-very-quiet-and-tinny-over-steam/2849197)
**Author:** [@Gamieon](https://forums.unrealengine.com/u/Gamieon)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 11:23pm UTC](https://forums.unrealengine.com/t/why-is-my-ue-5-7-voice-chat-audio-very-quiet-and-tinny-over-steam/2849197 "2026-11-02T23:23:54Z")
Through referencing a combination of the Lyra Starter Game and the video at https://www.youtube.com/watch?v=7phov5S1jwo , I was able to get voice chat mostly working (almost entirely in C++). However I cannot figure out … --- ## [lris crashes on my dedicated server saying replication protocol mismatch ](https://forums.unrealengine.com/t/lris-crashes-on-my-dedicated-server-saying-replication-protocol-mismatch/2534193)
**Author:** [@ICBC\_ChonG](https://forums.unrealengine.com/u/ICBC_ChonG)\ **Replies:** 1\ **Last updated:** [November 2, 2026, 8:17pm UTC](https://forums.unrealengine.com/t/lris-crashes-on-my-dedicated-server-saying-replication-protocol-mismatch/2534193 "2026-11-02T20:17:44Z")
I try to use lris, after I connect to the dedicated server, it gives the following error, it seems that the replication protocol does not match, is there a solution? DefaultEngine.ini: Build.cs: Dedicated Server… --- ## [What's the best/simplest way to set up multi-part weapons and how do i set up its desired systems?](https://forums.unrealengine.com/t/whats-the-best-simplest-way-to-set-up-multi-part-weapons-and-how-do-i-set-up-its-desired-systems/2848002)
**Author:** [@cjwag5](https://forums.unrealengine.com/u/cjwag5)\ **Replies:** 2\ **Last updated:** [November 2, 2026, 8:11pm UTC](https://forums.unrealengine.com/t/whats-the-best-simplest-way-to-set-up-multi-part-weapons-and-how-do-i-set-up-its-desired-systems/2848002 "2026-11-02T20:11:34Z")
i’ve been trying to create guns for my project, but every time its either seemed to become too complex or it straight up hasn’t worked, and i’m unsure what the best way is. i started way back when i FIRST got Unreal Eng… --- ## [Stopping actor deletion when outside of Network Cull Distance on clients?](https://forums.unrealengine.com/t/stopping-actor-deletion-when-outside-of-network-cull-distance-on-clients/2097087)
**Author:** [@Aragrom1](https://forums.unrealengine.com/u/Aragrom1)\ **Replies:** 7\ **Last updated:** [November 2, 2026, 8:02pm UTC](https://forums.unrealengine.com/t/stopping-actor-deletion-when-outside-of-network-cull-distance-on-clients/2097087 "2026-11-02T20:02:59Z")
TLDR: When an actor goes outside of NetCullDistance is it possible to stop it being deleted on the clients? Design: Base building multiplayer game. Many of the same actor types (Foundations, floors, walls etc). I would… --- ## [\[PCG 5.5.4\] Question about PCGData and PCGContext includes ](https://forums.unrealengine.com/t/pcg-5-5-4-question-about-pcgdata-and-pcgcontext-includes/2849171)
**Author:** [@Owl\_Gamedev](https://forums.unrealengine.com/u/Owl_Gamedev)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 7:30pm UTC](https://forums.unrealengine.com/t/pcg-5-5-4-question-about-pcgdata-and-pcgcontext-includes/2849171 "2026-11-02T19:30:37Z")
Recently I’ve been studying codes of PCG plugin during my attempts to make my own custom node, and I found something intresting. In PCGData.cpp, in part with includes, we have ’ include “PCGContext.h” ', but also we have… --- ## [Download Unreal Engine ](https://forums.unrealengine.com/t/download-unreal-engine/2849117)
**Author:** [@scrouzy](https://forums.unrealengine.com/u/scrouzy)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 5:46pm UTC](https://forums.unrealengine.com/t/download-unreal-engine/2849117 "2026-11-02T17:46:51Z")
Não consigo instalar o Unreal Engine pelo Epic Games Launcher 20.3.7. A lista “Versões de Engine” fica vazia e os botões “+” e “Instalar motor” não respondem. Já testei reiniciar completamente o Launcher, limpar o webca… --- ## [MAC上怎么显示金属编译错误 ](https://forums.unrealengine.com/t/mac/2848960)
**Author:** [@Andy\_start](https://forums.unrealengine.com/u/Andy_start)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 4:00pm UTC](https://forums.unrealengine.com/t/mac/2848960 "2026-11-02T16:00:52Z")
下载好UE5.8后，启动引擎时，显示金属编译器错误 然后就打开不了 --- ## [Fortnite Account Ban After Freddy Krueger Teleport Bug](https://forums.unrealengine.com/t/fortnite-account-ban-after-freddy-krueger-teleport-bug/2848952)
**Author:** [@edmatik74](https://forums.unrealengine.com/u/edmatik74)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 3:52pm UTC](https://forums.unrealengine.com/t/fortnite-account-ban-after-freddy-krueger-teleport-bug/2848952 "2026-11-02T15:52:03Z")
Dear Epic Games Support Team, I am writing because I am extremely disappointed and frustrated with how my Fortnite account suspension has been handled, and I sincerely hope that someone from your team will take the time… --- ## [Day 8 - Inventory System in C++ (Unreal Engine 5)](https://forums.unrealengine.com/t/day-8-inventory-system-in-c-unreal-engine-5/2848911)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 1:16pm UTC](https://forums.unrealengine.com/t/day-8-inventory-system-in-c-unreal-engine-5/2848911 "2026-11-02T13:16:07Z")
Hello everyone, I’ve just completed Day 8 of my Unreal Engine 5 Gameplay Engineer journey. Today I implemented my first Inventory System completely in C++. Features implemented: :white\_check\_mark: USTRUCT Inventory I… --- ## [How to Seamlessly Transition Between Two Large World Partition Maps at Runtime? ](https://forums.unrealengine.com/t/how-to-seamlessly-transition-between-two-large-world-partition-maps-at-runtime/2844445)
**Author:** [@Tim\_Xiao](https://forums.unrealengine.com/u/Tim_Xiao)\ **Replies:** 2\ **Last updated:** [November 2, 2026, 8:36am UTC](https://forums.unrealengine.com/t/how-to-seamlessly-transition-between-two-large-world-partition-maps-at-runtime/2844445 "2026-11-02T08:36:56Z")
Hello everyone, I am developing an open-world game in UE5 and have two very large city maps. Each city is a separate level that uses World Partition. I would like to know how to transition between these two World Parti… --- ## [Is it possible to create Islands for Fortnite with Unreal ](https://forums.unrealengine.com/t/is-it-possible-to-create-islands-for-fortnite-with-unreal/2848530)
**Author:** [@gwarks](https://forums.unrealengine.com/u/gwarks)\ **Replies:** 1\ **Last updated:** [November 2, 2026, 4:07am UTC](https://forums.unrealengine.com/t/is-it-possible-to-create-islands-for-fortnite-with-unreal/2848530 "2026-11-02T04:07:44Z")
I had UEFN installed yesterday but now it is gone. It failed to update and now it says it is no more supported anymore. I play Fortnite trough Amazon Luna and started development just this week. It is possible to use Unr… --- ## [Official exclusion of Antivirus ](https://forums.unrealengine.com/t/official-exclusion-of-antivirus/2847910)
**Author:** [@RMCBFM](https://forums.unrealengine.com/u/RMCBFM)\ **Replies:** 1\ **Last updated:** [November 2, 2026, 2:13am UTC](https://forums.unrealengine.com/t/official-exclusion-of-antivirus/2847910 "2026-11-02T02:13:28Z")
Hi there, I work for a company involved in the media industry, and we have recently installed Unreal Engine to create Augmented Reality and Virtual Reality content. My employer requires the use of Microsoft Defender En… [Previous page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=3) [Next page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=5)