LookupError: gradient registry has no entry for: Open3DReduceSubarraysSum

[dfldylan]

Checklist

• [X] I have searched for similar issues.
• [X] I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for master branch).

My Question

When I use ops.Open3DReduceSubarraysSum in my tensorflow project, I got a error "LookupError: gradient registry has no entry for: Open3DReduceSubarraysSum", What should I do?

[v-parmar]

Hey @dfldylan, This error message is indicating that TensorFlow's gradient registry does not have a registered gradient function for the Open3DReduceSubarraysSum operation, which means that TensorFlow cannot automatically compute the gradient of this operation during the backpropagation phase of training.

I have two approaches, you can try one of the following:

1. Implement a custom gradient function for Open3DReduceSubarraysSum and register it in TensorFlow's gradient registry.

2. If you don't need the gradient of Open3DReduceSubarraysSum during training, you can wrap this operation with tf.stop_gradient to prevent TensorFlow from trying to compute its gradient.