# \[BUG\] assign more than two bone IK make crash

**URL:** <https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814>\
**Category:** Character & Animation\
**Tags:** unreal-engine, bug-report, question\
**Created:** [March 20, 2015, 4:12am UTC](https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814 "2015-03-20T04:12:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mirsabayu](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mirsabayu](https://forums.unrealengine.com/u/mirsabayu)\
**Post date:** [March 20, 2015, 4:12am UTC](https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814/1 "2015-03-20T04:12:50Z")

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when i assign more that two bone IK, it will crash. don’t know why. i use UE4.6.2 btw

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**Author:** ![unit23](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/unit23/32/1146013_2.png) [@unit23](https://forums.unrealengine.com/u/unit23)\
**Post date:** [March 20, 2015, 5:17pm UTC](https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814/2 "2015-03-20T17:17:00Z")

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See also [https://answers.unrealengine.com/questions/196909/bug-blueprint-two-bone-ik-node-crashes-client-on-a.html](https://answers.unrealengine.com/questions/196909/bug-blueprint-two-bone-ik-node-crashes-client-on-a.html)

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**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:** [March 20, 2015, 6:37pm UTC](https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814/3 "2015-03-20T18:37:53Z")

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You can see the fix in the [4.7.3 fix notes](https://forums.unrealengine.com/showthread.php?63262-4-7-3-Hotfix-is-live!). I had entered this as UE-11369.

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**Author:** ![mirsabayu](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mirsabayu](https://forums.unrealengine.com/u/mirsabayu)\
**Post date:** [March 20, 2015, 9:13pm UTC](https://forums.unrealengine.com/t/bug-assign-more-than-two-bone-ik-make-crash/311814/4 "2015-03-20T21:13:08Z")

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ok, thx. but unfortunately, i still not migrating to ue4.7 hehehe, and i found the workaround for everybody out there that maybe had a same problem with me. break the link (make it to not had a simulation when you add the node.) and build the link from the IK animnode first. to your animation (either it your locomotion/blendspace/animsequence(all that would fire the tick/simulation)). hope can migrate my project soon.