# Weird Bug: Event Tick not running on IOS but works on PC **URL:** \ **Category:** Mobile\ **Tags:** bug, event-tick, unreal-engine, iOS, Blueprint, question\ **Created:** [July 15, 2015, 3:36am UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290 "2015-07-15T03:36:24Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![anonymous\_user\_61ce145f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61ce145f](https://forums.unrealengine.com/u/anonymous_user_61ce145f)\ **Post date:** [July 15, 2015, 3:36am UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/1 "2015-07-15T03:36:24Z")
I found a weird bug recently while toying with my evolve system as this bug only happens in IOS but not Windows/Editor. Is it something I am doing wrongly or is it a bug? Below are the steps to reproduce this issue: 1. Create a blueprint class (actor), name it **BP\_ParentTest** 2. Give BP\_Parent test a variable named **EvolveType** of type **Class BP\_ParentTest** _(Purple color)_ 3. Add a print node that prints “Hello” to **BP\_ParentTest EventTick** 4. Create a **child** of **BP\_ParentTest** and named it **BP\_ChildTest** 5. Go back to **BP\_ParentTest** and set the value of **EvolveType** to **BP\_ChildTest** 6. Add input logic (press 1) and spawn **BP\_ChildTest** on the level 7. BP\_ChildTest EventTick will never run (This only happens on IOS, works fine on Editor and PC) ---
**Author:** ![Serellyn](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Serellyn](https://forums.unrealengine.com/u/Serellyn)\ **Post date:** [July 15, 2015, 12:09pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/2 "2015-07-15T12:09:30Z")
I assume it’s a bug but I’m curious for some more information on this. Have you checked this behavior on an empty project? I’m currently not able to check this out myself… And are you able to check if this happens on Android as well? ---
**Author:** ![anonymous\_user\_a08c0bf2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_a08c0bf2](https://forums.unrealengine.com/u/anonymous_user_a08c0bf2)\ **Post date:** [July 15, 2015, 7:38pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/3 "2015-07-15T19:38:12Z")
Hey , I set up the first person template exactly as you described. When I launched the project on my iOS device, it opened up without any trouble and the print string began to spam me, due to being attached to the tick. Could you please tell me what type of template you’ve been using or perhaps provide the template to us directly to test? Looking forward to hearing back from you, thanks! ---
**Author:** ![anonymous\_user\_61ce145f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61ce145f](https://forums.unrealengine.com/u/anonymous_user_61ce145f)\ **Post date:** [July 16, 2015, 8:08pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/4 "2015-07-16T20:08:02Z")
@ ♦♦ STAFF Thanks for looking into this. Good news: after updating to 4.8.2 I can’t reproduce the steps that I mentioned. Bad news: My original blueprint still does it and I have no idea why. It is a huge blueprint actor class for my base character and have many child derived from it. I don’t know if its related to “LogScript:Warning: FLatentActionManager::ProcessLatentActions: CallbackTarget is None.” which pops up every now and then randomly as I can’t find the source of the warning. Either that or my blueprint is corrupted. If I do find a way to reproduce it or find the source of it, I will post here again or create a new post about it if this is closed. Edit: I would love to provide the template I am working on along with its child blueprints. Where should I send it to? ---
**Author:** ![anonymous\_user\_61ce145f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61ce145f](https://forums.unrealengine.com/u/anonymous_user_61ce145f)\ **Post date:** [July 16, 2015, 8:10pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/5 "2015-07-16T20:10:29Z")
I have, as of 4.8.2 it seems to be working fine, don’t even know what changed as the patch notes didn’t mention anything major. This bug is just weird, feels like my main character blueprint is corrupted somehow. P.S. I wasn’t able to test this on android as I don’t own one. ---
**Author:** ![anonymous\_user\_a08c0bf2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_a08c0bf2](https://forums.unrealengine.com/u/anonymous_user_a08c0bf2)\ **Post date:** [July 16, 2015, 8:59pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/6 "2015-07-16T20:59:49Z")
Hey , If you don’t want the public to gain access to your project, you can simply zip the full project and upload it to a site such as where it’ll be private and then simply provide the link to me through the forums. You should be able to easily find me by typing in ’ '. If you do not mind anyone else obtaining your project, simply enter the link as your next reply and I’ll look into the issue further for you. As a side-note, please keep in mind that when upgrading projects between different versions of the engine, issues may occur within the blueprint or your project entirely due to many changes that happen with each update. Thanks for your time! 🙂 ---
**Author:** ![anonymous\_user\_61ce145f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61ce145f](https://forums.unrealengine.com/u/anonymous_user_61ce145f)\ **Post date:** [July 16, 2015, 9:53pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/7 "2015-07-16T21:53:24Z")
I have sent you a private message with the project link. Because this is a commercial project I could not make it public. I will be sure to post back here once I get an update. ---
**Author:** ![anonymous\_user\_a08c0bf2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_a08c0bf2](https://forums.unrealengine.com/u/anonymous_user_a08c0bf2)\ **Post date:** [July 20, 2015, 4:55pm UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/8 "2015-07-20T16:55:16Z")
Hey , Thank you for providing such detailed information, I was able to locate what you were talking about once you showed me. They had a minor difference in name and I did not realize that would be the same one. With that being said, I have submitted a report, it could take a while before I hear back from our developers on whether or not this is intention or a bug but I will update you as soon as I hear back. If you’d like to check up on this report in the future, please reference: UE-18866. Thank you and have a nice day! ---
**Author:** ![anonymous\_user\_61ce145f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61ce145f](https://forums.unrealengine.com/u/anonymous_user_61ce145f)\ **Post date:** [July 21, 2015, 3:20am UTC](https://forums.unrealengine.com/t/weird-bug-event-tick-not-running-on-ios-but-works-on-pc/325290/9 "2015-07-21T03:20:30Z")
Awesome! Thanks for looking into the issue.