what's mean "Make sure the Rotation part of the Matrix is unit length."

Hi :slight_smile:
I’m currently trying to make the particles emerge from the character using the Niagara system’s skeletal mesh parameters.
However, it doesn’t work with the following error message.
What should I do?

Error Message:
Make sure the Rotation part of the Matrix is unit length.
// Changed to this (same as RemoveScaling) from RotDeterminant as using two different ways of checking unit length matrix caused inconsistency.

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