# Programming & Scripting **URL:** https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=1 [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) **Page:** 2 --- ## [\[Iris\] Warns/Ensures when streaming out actors that are initially replicating ](https://forums.unrealengine.com/t/iris-warns-ensures-when-streaming-out-actors-that-are-initially-replicating/2617732)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 2\ **Last updated:** [November 10, 2026, 8:53am UTC](https://forums.unrealengine.com/t/iris-warns-ensures-when-streaming-out-actors-that-are-initially-replicating/2617732 "2026-11-10T08:53:06Z")
This doesn’t happen every single time, so im not entirely sure what the state is that’s required to produce it, other than we have lots of actors, several of them stream in that have replication enabled. As sometimes hap… --- ## [IsLocallyControlled() in BeginPlay() with Iris Enabled](https://forums.unrealengine.com/t/islocallycontrolled-in-beginplay-with-iris-enabled/2703151)
**Author:** [@RaidenV\_00](https://forums.unrealengine.com/u/RaidenV_00)\ **Replies:** 2\ **Last updated:** [November 10, 2026, 6:58am UTC](https://forums.unrealengine.com/t/islocallycontrolled-in-beginplay-with-iris-enabled/2703151 "2026-11-10T06:58:49Z")
Hi, I encountered a problem when using Iris in UE5.6. I have many separate operations according to IsLocallyControlled() in BeginPlay(), such as if player is not locally controlled then he won’t create a widget on him. … --- ## [Errors when compiling](https://forums.unrealengine.com/t/errors-when-compiling/1268105)
**Author:** [@Gamemkaer21312](https://forums.unrealengine.com/u/Gamemkaer21312)\ **Replies:** 2\ **Last updated:** [November 10, 2026, 3:07am UTC](https://forums.unrealengine.com/t/errors-when-compiling/1268105 "2026-11-10T03:07:35Z")
Im not really sure how to explain, but here are all the errors: UATHelper: Cooking (Windows): LogShaderCompilers: Warning: 4 Shader compiler errors compiling global shaders for platform PCD3D\_SM6: UATHelper: Cooking (W… --- ## [All of the Create Projects are now Add To Project now?](https://forums.unrealengine.com/t/all-of-the-create-projects-are-now-add-to-project-now/2848005)
**Author:** [@RandomMishaps](https://forums.unrealengine.com/u/RandomMishaps)\ **Replies:** 5\ **Last updated:** [November 9, 2026, 9:49pm UTC](https://forums.unrealengine.com/t/all-of-the-create-projects-are-now-add-to-project-now/2848005 "2026-11-09T21:49:29Z")
Anyone else got Add To Projects in their Library but in Fab, it is Create Project? --- ## [FNativeFastArrayReplication Fragment is missing HasFullPushBasedDirtiness trait](https://forums.unrealengine.com/t/fnativefastarrayreplication-fragment-is-missing-hasfullpushbaseddirtiness-trait/2707703)
**Author:** [@blackrock0700](https://forums.unrealengine.com/u/blackrock0700)\ **Replies:** 1\ **Last updated:** [November 9, 2026, 9:16pm UTC](https://forums.unrealengine.com/t/fnativefastarrayreplication-fragment-is-missing-hasfullpushbaseddirtiness-trait/2707703 "2026-11-09T21:16:13Z")
I found that FNativeFastArrayReplicationFragment is being polled every frame because its traits are set to HasPushBasedDirtiness instead of HasFullPushBasedDirtiness. This logic exists in FFastArrayReplicationFragmentBas… --- ## [State Tree Transition OnEvent Jumps To Root When Different Event Tag Recieved](https://forums.unrealengine.com/t/state-tree-transition-onevent-jumps-to-root-when-different-event-tag-recieved/2852076)
**Author:** [@Sononeo](https://forums.unrealengine.com/u/Sononeo)\ **Replies:** 5\ **Last updated:** [November 9, 2026, 4:01pm UTC](https://forums.unrealengine.com/t/state-tree-transition-onevent-jumps-to-root-when-different-event-tag-recieved/2852076 "2026-11-09T16:01:43Z")
Sorry if this is something that’s been asked before, or may be a feature or how it’s intended to work. But I’m trying to make use of events in states in State Trees in order to go to either the next state or jump to a c… --- ## [Help with Zero-g FPS](https://forums.unrealengine.com/t/help-with-zero-g-fps/2852830)
**Author:** [@Eric\_G.Gregory](https://forums.unrealengine.com/u/Eric_G.Gregory)\ **Replies:** 1\ **Last updated:** [November 9, 2026, 3:39pm UTC](https://forums.unrealengine.com/t/help-with-zero-g-fps/2852830 "2026-11-09T15:39:15Z")
So I’m making an FPS with some zero-g zones in which the player character can move with 6 degrees of freedom (move in any direction and rotate in any axis) but I’m having some issues with the player’s rotation. When u… --- ## [Day 13 - Stackable Inventory System in C++ (Unreal Engine 5)](https://forums.unrealengine.com/t/day-13-stackable-inventory-system-in-c-unreal-engine-5/2852818)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 0\ **Last updated:** [November 9, 2026, 11:58am UTC](https://forums.unrealengine.com/t/day-13-stackable-inventory-system-in-c-unreal-engine-5/2852818 "2026-11-09T11:58:09Z")
Hello everyone, I’ve just completed Day 13 of my Unreal Engine 5 Gameplay Engineer journey. Today I upgraded my inventory system by implementing item stacking in C++. Before this update, collecting three coins created… --- ## [Cook failure....](https://forums.unrealengine.com/t/cook-failure/2852414)
**Author:** [@aerospike\_andy](https://forums.unrealengine.com/u/aerospike_andy)\ **Replies:** 2\ **Last updated:** [November 9, 2026, 6:27am UTC](https://forums.unrealengine.com/t/cook-failure/2852414 "2026-11-09T06:27:04Z")
Howdy brain trust, So I am getting this issue: never seen a cook failure before…any leads on what it might be? And yes i did read the log mentioned and it was unclear what might be causing it… --- ## [Thank you for speaking up on AI-assisted indie development and solo realities ](https://forums.unrealengine.com/t/thank-you-for-speaking-up-on-ai-assisted-indie-development-and-solo-realities/2852365)
**Author:** [@Havoc709](https://forums.unrealengine.com/u/Havoc709)\ **Replies:** 0\ **Last updated:** [November 8, 2026, 2:25pm UTC](https://forums.unrealengine.com/t/thank-you-for-speaking-up-on-ai-assisted-indie-development-and-solo-realities/2852365 "2026-11-08T14:25:32Z")
I wanted to share a quick word of thanks regarding Tim Sweeney’s recent posts about the actual economics and pressures of indie development. Traditional solo development—working a 12-month marathon under massive financi… --- ## [HideBoneByName does not affect attached components](https://forums.unrealengine.com/t/hidebonebyname-does-not-affect-attached-components/2852162)
**Author:** [@AgentMic0604](https://forums.unrealengine.com/u/AgentMic0604)\ **Replies:** 1\ **Last updated:** [November 8, 2026, 11:08am UTC](https://forums.unrealengine.com/t/hidebonebyname-does-not-affect-attached-components/2852162 "2026-11-08T11:08:10Z")
Although the documentation for this function states that it internally sets the bone’s scale to 0, the scale of the objects attached to that bone remains unchanged. This is strange. Even though I explicitly specified th… --- ## [Raid System like valhiem or palword](https://forums.unrealengine.com/t/raid-system-like-valhiem-or-palword/2850259)
**Author:** [@MARZ64331](https://forums.unrealengine.com/u/MARZ64331)\ **Replies:** 9\ **Last updated:** [November 8, 2026, 5:22am UTC](https://forums.unrealengine.com/t/raid-system-like-valhiem-or-palword/2850259 "2026-11-08T05:22:34Z")
I was wondering how I would be able to even make something like that. --- ## [Android Adreno Vulkan Crash in UE5.7.4 ](https://forums.unrealengine.com/t/android-adreno-vulkan-crash-in-ue5-7-4/2715269)
**Author:** [@Anonymous\_206ca6c69954d4f703db68f72de5eee8](https://forums.unrealengine.com/u/Anonymous_206ca6c69954d4f703db68f72de5eee8)\ **Replies:** 6\ **Last updated:** [November 8, 2026, 4:56am UTC](https://forums.unrealengine.com/t/android-adreno-vulkan-crash-in-ue5-7-4/2715269 "2026-11-08T04:56:40Z")
Hi，After I upgrade my engine to 5.7.4, there will be random crashes on the Android platform, especially during switching scene loading. Here is the crash stack. I am not good at rendering and engine, so I don’t know how … --- ## [I wonder if there is a file moving plugin..](https://forums.unrealengine.com/t/i-wonder-if-there-is-a-file-moving-plugin/2851803)
**Author:** [@foranie](https://forums.unrealengine.com/u/foranie)\ **Replies:** 1\ **Last updated:** [November 8, 2026, 12:10am UTC](https://forums.unrealengine.com/t/i-wonder-if-there-is-a-file-moving-plugin/2851803 "2026-11-08T00:10:19Z")
As many of you have experienced, when you try to organize by downloading third-party assets and moving them to a specific folder, various errors occur. Sometimes the file leaves a copy in its original location, sometime… --- ## [Broken Root Motion](https://forums.unrealengine.com/t/broken-root-motion/2849407)
**Author:** [@X\_AIZ\_X](https://forums.unrealengine.com/u/X_AIZ_X)\ **Replies:** 1\ **Last updated:** [November 7, 2026, 8:11pm UTC](https://forums.unrealengine.com/t/broken-root-motion/2849407 "2026-11-07T20:11:16Z")
Im having an annoying issues that is messing me up, my root motion is perfectly fine, its tracking perfectly, the Root Motion is Enabled but when used in an animation montage it wont move my character, Idk where the issu… --- ## [Replication of Character Ref in Player State](https://forums.unrealengine.com/t/replication-of-character-ref-in-player-state/2851537)
**Author:** [@Space\_Grouse](https://forums.unrealengine.com/u/Space_Grouse)\ **Replies:** 5\ **Last updated:** [November 7, 2026, 5:33pm UTC](https://forums.unrealengine.com/t/replication-of-character-ref-in-player-state/2851537 "2026-11-07T17:33:59Z")
I think I’m improperly using a reference to the player character inside the player state to replicate character customization. In the player character BP I created material instances. I created an actor component, name… --- ## [Destroy Object](https://forums.unrealengine.com/t/destroy-object/136337)
**Author:** [@Sergiy\_Plamen](https://forums.unrealengine.com/u/Sergiy_Plamen)\ **Replies:** 5\ **Last updated:** [November 7, 2026, 5:25pm UTC](https://forums.unrealengine.com/t/destroy-object/136337 "2026-11-07T17:25:37Z")
Maybe a silly question, but is there a function in blueprints which destroys objects? Like destroy actor, or destroy component? I’m currently trying to use a custom object class instead of actor components (I have my rea… --- ## [Migrating 3D Space Survival Game Logic from Web (Three.js) to Unreal Engine: Best Approach for Resource Management System? ](https://forums.unrealengine.com/t/migrating-3d-space-survival-game-logic-from-web-three-js-to-unreal-engine-best-approach-for-resource-management-system/2852006)
**Author:** [@GallantSwift2634](https://forums.unrealengine.com/u/GallantSwift2634)\ **Replies:** 0\ **Last updated:** [November 7, 2026, 2:59pm UTC](https://forums.unrealengine.com/t/migrating-3d-space-survival-game-logic-from-web-three-js-to-unreal-engine-best-approach-for-resource-management-system/2852006 "2026-11-07T14:59:15Z")
Seeking Advice: Migrating Our 3D Space Survival Game (AstroBase) to Unreal Engine Hi everyone! I’m Ratul, and I’m currently leading a team developing AstroBase, a 3D Moon and Mars survival simulation game originally bui… --- ## [Game Crashes with Fatal Error after config change](https://forums.unrealengine.com/t/game-crashes-with-fatal-error-after-config-change/619563)
**Author:** [@PolygonArt\_WEN](https://forums.unrealengine.com/u/PolygonArt_WEN)\ **Replies:** 1\ **Last updated:** [November 7, 2026, 10:21am UTC](https://forums.unrealengine.com/t/game-crashes-with-fatal-error-after-config-change/619563 "2026-11-07T10:21:14Z")
Hello, I have an early access game on Steam and I’m running into a strange error. I have recently added a new feature (vehicles) and added new inputs to the game. I release the update to the public and for the most pla… --- ## [Modeling Mode - Spiral Stair](https://forums.unrealengine.com/t/modeling-mode-spiral-stair/2849598)
**Author:** [@Jorge\_Da\_Cunha](https://forums.unrealengine.com/u/Jorge_Da_Cunha)\ **Replies:** 2\ **Last updated:** [November 6, 2026, 11:39pm UTC](https://forums.unrealengine.com/t/modeling-mode-spiral-stair/2849598 "2026-11-06T23:39:10Z")
Hi all! In modeling mode, I did a spiral stair, how can I put on a glass railing on it? --- ## [i need help to open the data ](https://forums.unrealengine.com/t/i-need-help-to-open-the-data/2851711)
**Author:** [@tesh\_baa](https://forums.unrealengine.com/u/tesh_baa)\ **Replies:** 0\ **Last updated:** [November 6, 2026, 7:40pm UTC](https://forums.unrealengine.com/t/i-need-help-to-open-the-data/2851711 "2026-11-06T19:40:17Z")
das is die nachricht die kam: Fehler beim Öffnen von Projekt //mvsdc1/homes$/J.Langhagel/Downloads/Redvblue/Redvblue/Redvblue.uefnproject. Projektdatei konnte nicht gelesen werden /dc1/hoes$/Jel/Downloads/Redvblue/Red… --- ## [Dynamic Material Instance weirdness](https://forums.unrealengine.com/t/dynamic-material-instance-weirdness/2850200)
**Author:** [@aerospike\_andy](https://forums.unrealengine.com/u/aerospike_andy)\ **Replies:** 4\ **Last updated:** [November 6, 2026, 4:47pm UTC](https://forums.unrealengine.com/t/dynamic-material-instance-weirdness/2850200 "2026-11-06T16:47:24Z")
Hi All, So I am trying to set a material to be translucent so i can (at run time) affect its opacity and make it fade in and out. However…when I change the material from “opaque” to “translucentcolortransmittance” and s… --- ## [What does the blackboard decorator do exactly? (+help with my decorator if possible) ](https://forums.unrealengine.com/t/what-does-the-blackboard-decorator-do-exactly-help-with-my-decorator-if-possible/2850993)
**Author:** [@LHopeBusiness](https://forums.unrealengine.com/u/LHopeBusiness)\ **Replies:** 3\ **Last updated:** [November 6, 2026, 4:43pm UTC](https://forums.unrealengine.com/t/what-does-the-blackboard-decorator-do-exactly-help-with-my-decorator-if-possible/2850993 "2026-11-06T16:43:04Z")
I understand that it’s a case of “if this is that, do this” but for some reason mine is firing off either way. I have it linked to a float key that I set when a task is fired off. For some reason, it aborts the sequence … --- ## [5.8 Gameplay Camera System Issue Causing Crashes ](https://forums.unrealengine.com/t/5-8-gameplay-camera-system-issue-causing-crashes/2846408)
**Author:** [@RunawayRobot](https://forums.unrealengine.com/u/RunawayRobot)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 4:05pm UTC](https://forums.unrealengine.com/t/5-8-gameplay-camera-system-issue-causing-crashes/2846408 "2026-11-06T16:05:22Z")
Since updating to 5.8 the Gameplay Camera system force crashes Unreal when you attempt to build, then save, a Camera Asset. I thought this issue was in fact a different one that had been solved on a different thread last… --- ## [Disabling Lumen and Nanite makes the shadows look smudgy? ](https://forums.unrealengine.com/t/disabling-lumen-and-nanite-makes-the-shadows-look-smudgy/2851093)
**Author:** [@FizzyBomb](https://forums.unrealengine.com/u/FizzyBomb)\ **Replies:** 2\ **Last updated:** [November 6, 2026, 2:05pm UTC](https://forums.unrealengine.com/t/disabling-lumen-and-nanite-makes-the-shadows-look-smudgy/2851093 "2026-11-06T14:05:49Z")
Hey all, I’ve followed this tutorial to disable lumen and nanite (the game I’m creating doesn’t require heavy lighting and shadows so I’m working to optimise them the best I can), but after restarting my project the shad… --- ## [How to setup EQS parameters when using the Run EQS Query BT Task with the query stored in a blackboard key?](https://forums.unrealengine.com/t/how-to-setup-eqs-parameters-when-using-the-run-eqs-query-bt-task-with-the-query-stored-in-a-blackboard-key/1968304)
**Author:** [@Reittoil](https://forums.unrealengine.com/u/Reittoil)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 12:35pm UTC](https://forums.unrealengine.com/t/how-to-setup-eqs-parameters-when-using-the-run-eqs-query-bt-task-with-the-query-stored-in-a-blackboard-key/1968304 "2026-11-06T12:35:12Z")
Hi there, As stated in the question title, I’m using UBTTask\_RunEQSQuery’s “EQSQuery Blackboard Key” parameter to dynamically inject the type of EQS query to execute in my behavior trees. However when doing so, I’m una… --- ## [Day 10 - Item Usage System in C++ (Unreal Engine 5)](https://forums.unrealengine.com/t/day-10-item-usage-system-in-c-unreal-engine-5/2849954)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 3\ **Last updated:** [November 6, 2026, 11:25am UTC](https://forums.unrealengine.com/t/day-10-item-usage-system-in-c-unreal-engine-5/2849954 "2026-11-06T11:25:54Z")
Hello everyone, I’ve just completed Day 10 of my Unreal Engine 5 Gameplay Engineer journey. Today I implemented an Item Usage System completely in C++. Features implemented: :white\_check\_mark: IA\_UseItem Input Action … --- ## [Day 12 - Consumable Item Removal System in C++ (Unreal Engine 5)](https://forums.unrealengine.com/t/day-12-consumable-item-removal-system-in-c-unreal-engine-5/2851484)
**Author:** [@kevinpc\_1](https://forums.unrealengine.com/u/kevinpc_1)\ **Replies:** 0\ **Last updated:** [November 6, 2026, 11:24am UTC](https://forums.unrealengine.com/t/day-12-consumable-item-removal-system-in-c-unreal-engine-5/2851484 "2026-11-06T11:24:25Z")
Hello everyone, I’ve just completed Day 12 of my Unreal Engine 5 Gameplay Engineer journey. Today I improved my consumable item system by implementing inventory item removal after usage. Features implemented: … --- ## [Collision Box being destroyed by pickup object ](https://forums.unrealengine.com/t/collision-box-being-destroyed-by-pickup-object/2849106)
**Author:** [@DollRotting](https://forums.unrealengine.com/u/DollRotting)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 9:55am UTC](https://forums.unrealengine.com/t/collision-box-being-destroyed-by-pickup-object/2849106 "2026-11-06T09:55:18Z")
I have a collision box that I want to be destroyed when an object that is picked up by the player is pressed against it, I have a pretty good idea on how to do the pickup system itself, but how do I assign the collision … --- ## [Verse Validation Failed ](https://forums.unrealengine.com/t/verse-validation-failed/2850244)
**Author:** [@sallinwagercarry](https://forums.unrealengine.com/u/sallinwagercarry)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 5:55am UTC](https://forums.unrealengine.com/t/verse-validation-failed/2850244 "2026-11-06T05:55:13Z")
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