# 'Transform Bone' stopped working in 4.12 \[DEMO PROJECT\] **URL:** \ **Category:** Character & Animation\ **Tags:** bone, unreal-engine, transform, construction-script, Blueprint, question\ **Created:** [June 6, 2016, 11:36am UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807 "2016-06-06T11:36:32Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [June 6, 2016, 11:36am UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/1 "2016-06-06T11:36:32Z")
4.12 broke my animation blueprint - I was setting my animation blueprint through Construction Script with ‘Transform Bone’ nodes, now they all stopped updating bones. For example, this should update bone location & scale from a variable that is set in Construction Script from other blueprint: 93506- … But now it doesn’t do anything. It worked OK before 4.12. **Update: It probably loses variable value somewhere, I’ve posted an example in the first comment…** How can I fix this? This issue stops me from updating my Marketplace tool for 4.12… * * * **------- UPDATE: -------** I’ve reproduced this bug in two simple demo projects, one working correctly for 4.11 and second one presenting the bug, for 4.12. Here are the project files: **4.12 project, bugged:** > **[Dropbox - File Deleted](https://www.dropbox.com/s/sgbocdswefwtsn1/AnimBP_BUG_4_12_BUGGED.zip?dl=0)** > > Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again! **4.11 project, working:** > **[Dropbox - File Deleted](https://www.dropbox.com/s/r2o6y7jzt4gigco/AnimBP_BUG_4_11_WORKING.zip?dl=0)** > > Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again! Changing his head scale in editor works in 4.11, but not in 4.12. They have exact the same setup. I’ve also discovered that it stopped working for Construction Script, but it works in-game. It looks like animation blueprint in 4.12 resets its variables every tick to default value. Please fix this, this bug destroys my Marketplace tool for 4.12 ☹ ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [June 7, 2016, 2:20pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/2 "2016-06-07T14:20:29Z")
I’ve created ‘Set Scale’ custom event to test where it loses variable value. The ‘scale’ variable is set via this custom event from other blueprint. Here is how it looks: ![93717-transformbonebug.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/6/f/b6f3238bc779b5f5e6732ae996f40abc4da66452.jpeg) … So it gets the value in animation blueprint, but it loses it somewhere and doesn’t use it in ‘Transform Bone’ nodes… Any clues? ☹ ---
**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\ **Post date:** [June 7, 2016, 3:59pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/3 "2016-06-07T15:59:16Z")
Hey Slavq, I’m having trouble getting this to actually work in 4.11. All I get is the default value for my test variable. Can you show me your construction script? ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [June 7, 2016, 4:13pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/4 "2016-06-07T16:13:42Z")
Sure, here is the part of construction script: ![93743-constrscript.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/3/8/738161bf09adae7aa42799be2ed8cc08fe4cbb58.jpeg) … And here is animation blueprint anim graph: ![93744-animbp.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/1/1/5110f84676b53afc6d87b8fdbd613e922e06fe36.jpeg) ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [June 9, 2016, 6:33pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/5 "2016-06-09T18:33:44Z")
**UPDATE:** I’ve reproduced this bug in two simple demo projects, one working correctly for 4.11 and second one presenting the bug, for 4.12. Here are the project files: **4.12 project, bugged:** > **[Dropbox - File Deleted](https://www.dropbox.com/s/sgbocdswefwtsn1/AnimBP_BUG_4_12_BUGGED.zip?dl=0)** > > Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again! **4.11 project, working:** > **[Dropbox - File Deleted](https://www.dropbox.com/s/r2o6y7jzt4gigco/AnimBP_BUG_4_11_WORKING.zip?dl=0)** > > Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again! Changing his head scale in editor works in 4.11, but not in 4.12. They have exact the same setup. I’ve also discovered that it stopped working for Construction Script, but it works in-game. It looks like animation blueprint in 4.12 resets its variables every tick to default value. Please fix this, this bug destroys my Marketplace tool for 4.12 ☹ ---
**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\ **Post date:** [June 10, 2016, 5:38pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/6 "2016-06-10T17:38:38Z")
Hey Slavq, Thanks for the example project. I’ve entered this as UE-31890. ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [June 20, 2016, 1:06pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/7 "2016-06-20T13:06:44Z")
Hello, any news on this? Is it hard to fix? Many people are asking about 4.12 compatibility of my Marketplace item and I can’t update it without this being fixed ☹ ---
**Author:** ![Tharidos](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tharidos](https://forums.unrealengine.com/u/Tharidos)\ **Post date:** [June 20, 2016, 2:04pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/8 "2016-06-20T14:04:16Z")
I hope they fix this soon, Project won’t work well without any solution to fix this. Rebuilding levels is no option for me. Let’s hope it will be done soon. It work well in the editor but not on play. Then all is disorientated. Peter J. ---
**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\ **Post date:** [June 20, 2016, 8:06pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/9 "2016-06-20T20:06:15Z")
Hey Slavq, Unfortunately this likely won’t make it into a hotfix for 4.12. It’s marked as to-do, but I don’t think anybody has dug into it yet to see how hard a fix will be. ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [July 6, 2016, 9:46pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/10 "2016-07-06T21:46:15Z")
Hey, Is this maybe connected with [THIS](https://answers.unrealengine.com/questions/443821/poseable-mesh-doesnt-work-in-construction-script.html) bug? They’re both based on skeletal controls not working via Construction Script. ---
**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\ **Post date:** [July 8, 2016, 6:47pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/11 "2016-07-08T18:47:32Z")
Hey Slavq, No, this bug is still being worked on and is not yet resolved. That other bug no longer occurs in latest 4.13 builds. ---
**Author:** ![Slavq](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Post date:** [July 21, 2016, 7:48pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/12 "2016-07-21T19:48:28Z")
Hello, User @Nate has tested the bug project in 4,13 today and it appears to be fixed - [INFO SOURCE.](https://forums.unrealengine.com/showthread.php?96387-Dynamic-Tree-amp-Plant-Generator/page2&p=568538#post568538) I can’t check on my own yet, but I would like to confirm it, is it officially fixed? Thanks! ---
**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\ **Post date:** [July 22, 2016, 2:49pm UTC](https://forums.unrealengine.com/t/transform-bone-stopped-working-in-4-12-demo-project/359807/13 "2016-07-22T14:49:37Z")
Yes, it was fixed for 4.13