# \#functions **URL:** https://forums.unrealengine.com/tag/functions/178.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Can i run function or change variable from console?](https://forums.unrealengine.com/t/can-i-run-function-or-change-variable-from-console/464928)
**Author:** [@1987kostya](https://forums.unrealengine.com/u/1987kostya)\ **Replies:** 2\ **Last updated:** [September 28, 2026, 8:38pm UTC](https://forums.unrealengine.com/t/can-i-run-function-or-change-variable-from-console/464928 "2026-09-28T20:38:45Z")
Can I run a function in a specific object on the map using the console? Or maybe I can change the variable value using console --- ## [Why can't I call a public function of a parent EUW widget via a reference variable in a child widget within the blueprint editor? ](https://forums.unrealengine.com/t/why-cant-i-call-a-public-function-of-a-parent-euw-widget-via-a-reference-variable-in-a-child-widget-within-the-blueprint-editor/2762702)
**Author:** [@ricochet52](https://forums.unrealengine.com/u/ricochet52)\ **Replies:** 8\ **Last updated:** [September 17, 2026, 1:41am UTC](https://forums.unrealengine.com/t/why-cant-i-call-a-public-function-of-a-parent-euw-widget-via-a-reference-variable-in-a-child-widget-within-the-blueprint-editor/2762702 "2026-09-17T01:41:58Z")
Hi folks! I’ve been tinkering with a custom dialogue system, and I made the above editor utility widget (EUW) to preview what dialogue scenes will look like without having to fire up the game and click through dialog… --- ## [What's the difference between Blueprint Macros and Blueprint Functions?](https://forums.unrealengine.com/t/whats-the-difference-between-blueprint-macros-and-blueprint-functions/280809)
**Author:** [@Feanix](https://forums.unrealengine.com/u/Feanix)\ **Replies:** 28\ **Last updated:** [August 20, 2026, 4:28pm UTC](https://forums.unrealengine.com/t/whats-the-difference-between-blueprint-macros-and-blueprint-functions/280809 "2026-08-20T16:28:55Z")
They both seem to do the same thing in the end. When should I use a function and when should I use a function? --- ## [Function notifications in MVVM do not work at all.](https://forums.unrealengine.com/t/function-notifications-in-mvvm-do-not-work-at-all/2742448)
**Author:** [@SemanticRain619](https://forums.unrealengine.com/u/SemanticRain619)\ **Replies:** 9\ **Last updated:** [August 11, 2026, 5:26am UTC](https://forums.unrealengine.com/t/function-notifications-in-mvvm-do-not-work-at-all/2742448 "2026-08-11T05:26:49Z")
I’ve spent two hours reading through the documentation on MVVM, yet this simple system still isn’t working. I am trying to update an integer on the VM, convert it to text using a function on the VM, and assign it to the… --- ## [How can I make my graph not compile if a custom function's input is not set?](https://forums.unrealengine.com/t/how-can-i-make-my-graph-not-compile-if-a-custom-functions-input-is-not-set/2723831)
**Author:** [@OrangeAedan](https://forums.unrealengine.com/u/OrangeAedan)\ **Replies:** 2\ **Last updated:** [May 22, 2026, 6:31pm UTC](https://forums.unrealengine.com/t/how-can-i-make-my-graph-not-compile-if-a-custom-functions-input-is-not-set/2723831 "2026-05-22T18:31:47Z")
Hello everyone. I am making a custom function that sets up a custom component I made. Here is my function btw: UFUNCTION(BlueprintCallable, Category = "Vehicle|Engine", meta = ( ToolTip = "Setup the EngineAudioManager.\\… --- ## [How do you debug a function in a blueprint function library?](https://forums.unrealengine.com/t/how-do-you-debug-a-function-in-a-blueprint-function-library/287564)
**Author:** [@Jeremy\_McKeown](https://forums.unrealengine.com/u/Jeremy_McKeown)\ **Replies:** 19\ **Last updated:** [May 18, 2026, 6:33pm UTC](https://forums.unrealengine.com/t/how-do-you-debug-a-function-in-a-blueprint-function-library/287564 "2026-05-18T18:33:39Z")
I have several blueprint function libraries that I use for utility functions. I’ve noticed that when you set a break point and step into a blueprint library function it that blueprint debugger stops providing watch inf… --- ## [Rapid Fire (No Cooldown) was mistakenly placed under Infinite Ammo/Magazine instead of being a proper system option](https://forums.unrealengine.com/t/rapid-fire-no-cooldown-was-mistakenly-placed-under-infinite-ammo-magazine-instead-of-being-a-proper-system-option/2719237)
**Author:** [@yoshili](https://forums.unrealengine.com/u/yoshili)\ **Replies:** 0\ **Last updated:** [April 30, 2026, 5:54pm UTC](https://forums.unrealengine.com/t/rapid-fire-no-cooldown-was-mistakenly-placed-under-infinite-ammo-magazine-instead-of-being-a-proper-system-option/2719237 "2026-04-30T17:54:13Z")
@Flak @EPIC @Bug-Reporter I believe this situation is primarily based on a misunderstanding, partly caused by how the feature was implemented and how it was reported. To avoid further confusion and to better support bot… --- ## [How can I ensure that a function owner only receives executions from specific targets?](https://forums.unrealengine.com/t/how-can-i-ensure-that-a-function-owner-only-receives-executions-from-specific-targets/2669551)
**Author:** [@Extrahdmi](https://forums.unrealengine.com/u/Extrahdmi)\ **Replies:** 4\ **Last updated:** [October 30, 2025, 6:45am UTC](https://forums.unrealengine.com/t/how-can-i-ensure-that-a-function-owner-only-receives-executions-from-specific-targets/2669551 "2025-10-30T06:45:21Z")
If the same function is executed from multiple targets, how do I select which target it was executed from and process the function accordingly? For example, if a function is executed from targets A and B, I want to rece… --- ## [Is there any way to get a delay in a function](https://forums.unrealengine.com/t/is-there-any-way-to-get-a-delay-in-a-function/391023)
**Author:** [@678GUY](https://forums.unrealengine.com/u/678GUY)\ **Replies:** 23\ **Last updated:** [June 6, 2025, 4:17am UTC](https://forums.unrealengine.com/t/is-there-any-way-to-get-a-delay-in-a-function/391023 "2025-06-06T04:17:14Z")
is there any way to get some sort of a delay in a function dosent matter how just need a delay i dont care how complicated it is but i need it real bad --- ## [Where is the "On State Interrupt"-Event/Function state in AnimationBlueprint?](https://forums.unrealengine.com/t/where-is-the-on-state-interrupt-event-function-state-in-animationblueprint/1881083)
**Author:** [@OppaAi](https://forums.unrealengine.com/u/OppaAi)\ **Replies:** 1\ **Last updated:** [May 5, 2025, 4:24pm UTC](https://forums.unrealengine.com/t/where-is-the-on-state-interrupt-event-function-state-in-animationblueprint/1881083 "2025-05-05T16:24:26Z")
Hello fellas, first of all, I hope I am correct here in this section since I am not sure if questions about AnimationBlueprints are related to Animations or Blueprints. Forgive me if I am wrong. My question is: Is there… --- ## [USE A LOCAL FUNCTION IN ESTERNAL BPS?](https://forums.unrealengine.com/t/use-a-local-function-in-esternal-bps/2479422)
**Author:** [@Cykablatta](https://forums.unrealengine.com/u/Cykablatta)\ **Replies:** 34\ **Last updated:** [April 29, 2025, 7:31am UTC](https://forums.unrealengine.com/t/use-a-local-function-in-esternal-bps/2479422 "2025-04-29T07:31:29Z")
Hello ev! :slightly\_smiling\_face: I made a Blueprint Interface implemented in multiple different bps, so at 1 call x of them could responde and execute. Now, If I’m not wrong, I know is not possible to refer a local bp’… --- ## [Is it bad practice to Declare a Function in Anim Instance? c++](https://forums.unrealengine.com/t/is-it-bad-practice-to-declare-a-function-in-anim-instance-c/2385746)
**Author:** [@enam1984](https://forums.unrealengine.com/u/enam1984)\ **Replies:** 1\ **Last updated:** [March 12, 2025, 4:08pm UTC](https://forums.unrealengine.com/t/is-it-bad-practice-to-declare-a-function-in-anim-instance-c/2385746 "2025-03-12T16:08:05Z")
Hi all, I am creating an FPS type game. I created a function called Procedural Recoil In which I outlined recoil functionality. The Function then gets triggered from a button press in the Character.cpp Class (Fire We… --- ## [Variable is Set with Function, But Always Goes on To Use the Default Value](https://forums.unrealengine.com/t/variable-is-set-with-function-but-always-goes-on-to-use-the-default-value/2377805)
**Author:** [@Maximum.Dino](https://forums.unrealengine.com/u/Maximum.Dino)\ **Replies:** 1\ **Last updated:** [March 6, 2025, 2:12pm UTC](https://forums.unrealengine.com/t/variable-is-set-with-function-but-always-goes-on-to-use-the-default-value/2377805 "2025-03-06T14:12:17Z")
Hello, I’m super confused about why I’m unable to set a variable. For context, this has been happening in multiple situations and I’m thinking I somehow am missing something huge that I should know but don’t. So I’m tryi… --- ## [I can't use Delay within Fuctions. Now what?](https://forums.unrealengine.com/t/i-cant-use-delay-within-fuctions-now-what/393653)
**Author:** [@The7thNoodle](https://forums.unrealengine.com/u/The7thNoodle)\ **Replies:** 1\ **Last updated:** [May 15, 2017, 1:47pm UTC](https://forums.unrealengine.com/t/i-cant-use-delay-within-fuctions-now-what/393653 "2017-05-15T13:47:14Z")
Good evening ladies and gents. I’m making a Space Shooter for a University assignment, I’m fairly new to Unreal. I put a lot of work into planning the Design and Systems of this shooter prior to starting development as… --- ## [Expose function to blueprints with Plus (+) sign!](https://forums.unrealengine.com/t/expose-function-to-blueprints-with-plus-sign/2237902)
**Author:** [@ShinyLopunny69](https://forums.unrealengine.com/u/ShinyLopunny69)\ **Replies:** 2\ **Last updated:** [December 26, 2024, 12:48am UTC](https://forums.unrealengine.com/t/expose-function-to-blueprints-with-plus-sign/2237902 "2024-12-26T00:48:37Z")
You know how there are some customizable nodes in blueprints that have a (+) button and you can click it and add outputs for the node? Like the switch on string, you click + and u add each string-case and the outputs up… --- ## [On Key Down Not Triggering](https://forums.unrealengine.com/t/on-key-down-not-triggering/482946)
**Author:** [@Zego\_Fr34ks](https://forums.unrealengine.com/u/Zego_Fr34ks)\ **Replies:** 12\ **Last updated:** [July 24, 2024, 11:03am UTC](https://forums.unrealengine.com/t/on-key-down-not-triggering/482946 "2024-07-24T11:03:17Z")
Hi, I want to print my pressed key on the screen so I used this to do it: But it doesn’t get triggered (my widget is added to the viewport). Does anybody know what I did wrong? --- ## [Using Enums With Functions](https://forums.unrealengine.com/t/using-enums-with-functions/1882601)
**Author:** [@ignavuss](https://forums.unrealengine.com/u/ignavuss)\ **Replies:** 2\ **Last updated:** [June 5, 2024, 8:40am UTC](https://forums.unrealengine.com/t/using-enums-with-functions/1882601 "2024-06-05T08:40:59Z")
Hey everyone! It’s my first week on UE, sorry if the question is too basic. I was going to ask can I use Enums as multiple functions. I made Math Interaction Enum with “Plus, divide etc” inside, I want to combine it wit… --- ## [Why am I getting an error of "\_\_\_\_\_\_ should not be called from a Blueprint" when I restart the Editor?](https://forums.unrealengine.com/t/why-am-i-getting-an-error-of-should-not-be-called-from-a-blueprint-when-i-restart-the-editor/281628)
**Author:** [@Kaonashi](https://forums.unrealengine.com/u/Kaonashi)\ **Replies:** 12\ **Last updated:** [June 4, 2024, 8:39pm UTC](https://forums.unrealengine.com/t/why-am-i-getting-an-error-of-should-not-be-called-from-a-blueprint-when-i-restart-the-editor/281628 "2024-06-04T20:39:33Z")
After struggling with this issue regarding my project I decided to submit my question to propper assistance. I created this Blueprint consisting of a Box for simple Overlap Events. This Blueprint acts as my Area Volume (… --- ## [翻译错误（简体中文）](https://forums.unrealengine.com/t/topic/1671485)
**Author:** [@xmh233](https://forums.unrealengine.com/u/xmh233)\ **Replies:** 1\ **Last updated:** [May 30, 2024, 4:30am UTC](https://forums.unrealengine.com/t/topic/1671485 "2024-05-30T04:30:34Z")
我发现了UE中一个翻译错误，在蓝图的函数位置，有一个按钮，实际作用和英文文本都是“重写（override）”，但在UE的中文模式下显示为“重载（override）”，这是两个不同的概念，如果验证后确定为真实，希望可以改正。 --- ## [\[Feature Request\] Limited Input Flexibility in Material Functions](https://forums.unrealengine.com/t/feature-request-limited-input-flexibility-in-material-functions/1873959)
**Author:** [@Ibtesam\_Sadiq](https://forums.unrealengine.com/u/Ibtesam_Sadiq)\ **Replies:** 0\ **Last updated:** [May 26, 2024, 3:18pm UTC](https://forums.unrealengine.com/t/feature-request-limited-input-flexibility-in-material-functions/1873959 "2024-05-26T15:18:58Z")
Current Behavior: Material functions require specific data type inputs (Vector2, Vector3, Vector4, Scalar). Built-in expressions within functions can handle various data types (automatic conversion). Problem: Creati… --- ## ["Goto defintion" option for BP nodes does nothing](https://forums.unrealengine.com/t/goto-defintion-option-for-bp-nodes-does-nothing/433659)
**Author:** [@Schytheron](https://forums.unrealengine.com/u/Schytheron)\ **Replies:** 19\ **Last updated:** [May 3, 2024, 4:15pm UTC](https://forums.unrealengine.com/t/goto-defintion-option-for-bp-nodes-does-nothing/433659 "2024-05-03T16:15:34Z")
So I was told that you can search for C++ function equivalents of Blueprint nodes if you right-click a blueprint node and choose “Goto Definition” (only works for C++ projects). So I made a fresh new C++ project to test… --- ## [Whitch function will called faster bound with delegate or set in SetTimer().](https://forums.unrealengine.com/t/whitch-function-will-called-faster-bound-with-delegate-or-set-in-settimer/1837257)
**Author:** [@ebrebzzeeere](https://forums.unrealengine.com/u/ebrebzzeeere)\ **Replies:** 0\ **Last updated:** [May 2, 2024, 11:42pm UTC](https://forums.unrealengine.com/t/whitch-function-will-called-faster-bound-with-delegate-or-set-in-settimer/1837257 "2024-05-02T23:42:53Z")
Hi I’m new to UE. Suppose I have a function1 set in SetTimer(). On the other hand, I have a function2 bound with delegate which execute ClearTimer(). Here I have a question. What time function1 called finally? I don… --- ## [Why is my child blueprint not inheriting parent functions?](https://forums.unrealengine.com/t/why-is-my-child-blueprint-not-inheriting-parent-functions/745894)
**Author:** [@Freglz](https://forums.unrealengine.com/u/Freglz)\ **Replies:** 13\ **Last updated:** [August 4, 2023, 11:31pm UTC](https://forums.unrealengine.com/t/why-is-my-child-blueprint-not-inheriting-parent-functions/745894 "2023-08-04T23:31:18Z")
First post here, sorry if I don’t have the right question categories. I’m following a tutorial on implementing a weapon system into a project. Each weapon is a child of a base weapon actor class, which is a child of a … --- ## [Materials and Material Instances are broken in 5.3.1 (Crash)](https://forums.unrealengine.com/t/materials-and-material-instances-are-broken-in-5-3-1-crash/1318565)
**Author:** [@krisausataya](https://forums.unrealengine.com/u/krisausataya)\ **Replies:** 2\ **Last updated:** [March 24, 2024, 7:23am UTC](https://forums.unrealengine.com/t/materials-and-material-instances-are-broken-in-5-3-1-crash/1318565 "2024-03-24T07:23:18Z")
Crash happens when switching Static Bool parameters in Material Instances. Crash log: Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0x0000000000000008 UnrealEditor\_MaterialEditor!FMaterialEditorUtili… --- ## [This function parameter expects a value of type tuple()-\>void, but this argument is an incompatible value of type player-\>void.(3509)](https://forums.unrealengine.com/t/this-function-parameter-expects-a-value-of-type-tuple-void-but-this-argument-is-an-incompatible-value-of-type-player-void-3509/1567947)
**Author:** [@Safixabs](https://forums.unrealengine.com/u/Safixabs)\ **Replies:** 1\ **Last updated:** [December 29, 2023, 9:34am UTC](https://forums.unrealengine.com/t/this-function-parameter-expects-a-value-of-type-tuple-void-but-this-argument-is-an-incompatible-value-of-type-player-void-3509/1567947 "2023-12-29T09:34:39Z")
I want that when the car explodes and comes back, the player gets into the car as its driver help ヾ(＠⌒ー⌒＠)ノ --- ## [\[C++\]How to return more than two variables from a function?](https://forums.unrealengine.com/t/c-how-to-return-more-than-two-variables-from-a-function/1369094)
**Author:** [@blAddddDe](https://forums.unrealengine.com/u/blAddddDe)\ **Replies:** 10\ **Last updated:** [November 8, 2023, 5:44pm UTC](https://forums.unrealengine.com/t/c-how-to-return-more-than-two-variables-from-a-function/1369094 "2023-11-08T17:44:47Z")
I have a function that should take two arguments and return the other two (different types). How can I return them so that I can use them in other C++ functions? --- ## [How to call functions from the "master" blueprint?](https://forums.unrealengine.com/t/how-to-call-functions-from-the-master-blueprint/1369364)
**Author:** [@RetroMonroe](https://forums.unrealengine.com/u/RetroMonroe)\ **Replies:** 2\ **Last updated:** [November 7, 2023, 3:52am UTC](https://forums.unrealengine.com/t/how-to-call-functions-from-the-master-blueprint/1369364 "2023-11-07T03:52:35Z")
Hi! I’ve created a “master” blueprint that will hold the other game mechanic blueprints. The goal is to have these players mechanics work on different interactable objects in the level. I dragged and dropped the blueprin… --- ## [How to collapse function variables in Blueprint?](https://forums.unrealengine.com/t/how-to-collapse-function-variables-in-blueprint/396200)
**Author:** [@anonymous\_user\_9ad25384](https://forums.unrealengine.com/u/anonymous_user_9ad25384)\ **Replies:** 2\ **Last updated:** [November 3, 2023, 12:29am UTC](https://forums.unrealengine.com/t/how-to-collapse-function-variables-in-blueprint/396200 "2023-11-03T00:29:33Z")
Hello. To put it quite simply, I was wondering how to group/hide variables of a function, similar to the Print String function. I have been digging around, but I cannot find out how to do this. I’m sorry if the title is… --- ## [Variable value does not change](https://forums.unrealengine.com/t/variable-value-does-not-change/1357743)
**Author:** [@blAddddDe](https://forums.unrealengine.com/u/blAddddDe)\ **Replies:** 33\ **Last updated:** [November 2, 2023, 7:40pm UTC](https://forums.unrealengine.com/t/variable-value-does-not-change/1357743 "2023-11-02T19:40:35Z")
Hi everyone, I have a question. I have an event dispatcher: QuestComplete. When it is called in the function bound to it, the value of the variable that determines the choice of actions is changed. The problem is that th… --- ## ["Run on Server" Function](https://forums.unrealengine.com/t/run-on-server-function/1330161)
**Author:** [@Leo\_kill7](https://forums.unrealengine.com/u/Leo_kill7)\ **Replies:** 4\ **Last updated:** [October 13, 2023, 10:25am UTC](https://forums.unrealengine.com/t/run-on-server-function/1330161 "2023-10-13T10:25:48Z")
Is there a possibility to run a functions on server. I am not talking about events but about functions [Next page](https://forums.unrealengine.com/tag/functions/178.md?match_all_tags=true&page=1&tags%5B%5D=functions)