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There can be several possibilities,

  • The position is actually not reachable using current Inverse Kinematic solver.

  • Time of solving is not enough for the solver.

  • you are asking for fine resolution.

To tweak your parameters, I will suggest to make changes in this file. Try different IK solver suck as Trac-IK, IK-fast etc. Try increasing the resolution a bit, Increase timeout and the attempts made by solver. Try to move it to some known position for testing.

There can be several possibilities,

  • The position is actually not reachable using current Inverse Kinematic solver.

  • Time of solving is not enough for the solver.

  • you are asking for fine resolution.

To tweak your parameters, I will suggest to make changes in this file. Try different IK solver suck such as Trac-IK, IK-fast etc. Try increasing the resolution a bit, Increase timeout and the attempts made by solver. Try to move it to some known position for testing. testing.