# Unable to change Position Target Strength on Physics Constraint **URL:** \ **Category:** World Creation\ **Tags:** target, physics-constraints, actor-blueprint, details-panel-ui, unreal-engine, question\ **Created:** [January 4, 2017, 6:57pm UTC](https://forums.unrealengine.com/t/unable-to-change-position-target-strength-on-physics-constraint/380902 "2017-01-04T18:57:15Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Titirez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/titirez/32/1194668_2.png) [@Titirez](https://forums.unrealengine.com/u/Titirez)\ **Post date:** [January 4, 2017, 6:57pm UTC](https://forums.unrealengine.com/t/unable-to-change-position-target-strength-on-physics-constraint/380902/1 "2017-01-04T18:57:15Z")
Create an actor blueprint, add 2 static meshes and a Physics constraint inside. Setup the constraint between the 2 static mesh components. Drop the blueprint inside the scene. In the details panel of the actor blueprint, navigate to the physics constraint and try to change the “Position Target Strength”. If I add a value other then the default value, 3 lines appear. ![120816-capture1.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/d/a/bda197f9bf42758229fccdd2859b9bf177ebdcd5.png) ![120817-capture2.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/8/4/384732438c9d5a056749b8197e64b76e77534a0a.png) ---
**Author:** ![TJ\_V](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/tj_v/32/1008648_2.png) [@TJ\_V](https://forums.unrealengine.com/u/TJ_V)\ **Post date:** [January 5, 2017, 8:36pm UTC](https://forums.unrealengine.com/t/unable-to-change-position-target-strength-on-physics-constraint/380902/2 "2017-01-05T20:36:17Z")
Hi Titirez, Thank you for the report. I was able to reproduce this and I’ve created [JIRA UE-40261](https://issues.unrealengine.com/issue/UE-40261). Our developers will be investigating further. Follow that link to monitor the status of the bug report and feel free to vote on it’s priority. Cheers, TJ