# Match tools to IK create strange values on ball roll

**URL:** <https://kangaroobuilder.discourse.group/t/match-tools-to-ik-create-strange-values-on-ball-roll/37>\
**Category:** Picker\
**Created:** [September 9, 2025, 2:54pm UTC](https://kangaroobuilder.discourse.group/t/match-tools-to-ik-create-strange-values-on-ball-roll/37 "2025-09-09T14:54:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rigonaut](https://avatars.discourse-cdn.com/v4/letter/r/74df32/32.png) [@Rigonaut](https://kangaroobuilder.discourse.group/u/Rigonaut)\
**Post date:** [September 9, 2025, 2:54pm UTC](https://kangaroobuilder.discourse.group/t/match-tools-to-ik-create-strange-values-on-ball-roll/37/1 "2025-09-09T14:54:55Z")

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Is there something I’m doing wrong?

 ![image](https://canada1.discourse-cdn.com/flex009/uploads/kangaroobuilder/original/1X/50c1a59e56c33761b3976d734fcf37949cbd1f0d.png)

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**Author:** ![ThomasBittner](https://avatars.discourse-cdn.com/v4/letter/t/f08c70/32.png) [@ThomasBittner](https://kangaroobuilder.discourse.group/u/ThomasBittner)\
**Post date:** [September 9, 2025, 3:06pm UTC](https://kangaroobuilder.discourse.group/t/match-tools-to-ik-create-strange-values-on-ball-roll/37/2 "2025-09-09T15:06:38Z")

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We found this issue already! It happened on last version (5.13), and will be fixed in the next kangaroo version.

There’s a cycle happening on the match tool, which makes the ballRoll go crazy.

One workaround until getting the next version is to set the **Pivot Ctrls** to anything else than None:

 ![image](https://canada1.discourse-cdn.com/flex009/uploads/kangaroobuilder/original/1X/c078314b5096c22359ec31b46dc12555f1e3740d.png)

Or - if you wanna fix it in the python code yourself, you could go into the python file of **armLeg\_v42.py** , and change this line:

```auto
sDummyAnkle = cmds.duplicate(self.cAnkleRev.sCtrl, po=True)[0]

```

to

```auto
sDummyAnkle = cmds.duplicate(sToeAttrGrp, po=True)[0]

```

This will make it not create the cycle on the match tools

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<div class="post-metadata">

**Author:** ![Rigonaut](https://avatars.discourse-cdn.com/v4/letter/r/74df32/32.png) [@Rigonaut](https://kangaroobuilder.discourse.group/u/Rigonaut)\
**Post date:** [September 29, 2025, 5:56pm UTC](https://kangaroobuilder.discourse.group/t/match-tools-to-ik-create-strange-values-on-ball-roll/37/3 "2025-09-29T17:56:34Z")

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Thanks @ThomasBittner

Fixing this in the code solved our problems