"A chain is not valid. Aborting setup" warning is spamming the output

[Wonuf]

I noticed recently a new, random and vague warning kept displaying in my output “A chain is not valid. Aborting setup”

I initially thought this was a plugin causing this error however after looking at my games error reports it is also getting spammed there (over 100 million warnings sent)

In studio this creates a severe amount of lag as at random intervals over 5k warnings were sent in quick succession

[Reisdro_08]

Salutations!

Thanks for reporting.
We’ve identified this topic as a duplicate of an earlier report that is acknowledged and assigned for investigation.

I’ll close this topic, but please stay on the loop in the following thread:

A chain is not valid. (warn statements)

This post is related to: Most probable cause is an update/error with IKControls that impacts warn statements and when being updated (?) causes massive frame drops due to the constant output: [image] (hits the 5000 limit)

Thanks for your understanding.
Have a nice day!

[ReiDosDev]

Any news about this issue? I’m losing players because of this bug! It’s a bug in the IK control system.

[SpookyStud10s (Spooky)]

A chain is not valid. Aborting setup ? Need Help

I am not experiencing frame loss, but updating my Rigs via IKControl seems to make related parts of the rig or the whole rig disappear. I looked into how they disappear and it seems that their Position gets set to nan, nan, nan. This happens with frequently updated IKControl instances that suffer from A chain is not valid. Aborting setup The IKControl Type is set to Rotation, yet it still causes the nan, nan, nan Position issue. Also in some rare cases and/or angles, the rigs re-appear. I…