No gradient defined for op: ClipByValue

[Cr33zz]

I'm using TensorFlowSharp NuGet package 1.12.0. I used ClipByValue in my graph and when I AddGradients I get the following exception:

TensorFlow.TFException HResult=0x80131500 Message=No gradient defined for op: ClipByValue. Please see https://www.tensorflow.org/code/tensorflow/cc/gradients/README.md for instructions on how to add C++ gradients. Source=TensorFlowSharp StackTrace: at TensorFlow.TFStatus.CheckMaybeRaise(TFStatus incomingStatus, Boolean last) at TensorFlow.TFGraph.AddGradients(TFOutput[] y, TFOutput[] x, TFOutput[] dx, TFStatus status) at Neuro.Backend.Gradients(Tensor loss, List1 param) in E:\GitHub\Neuro\Neuro\Backend.cs:line 242 at Neuro.Optimizers.SGD.GenerateUpdates(List1 parameters, Tensor loss) in E:\GitHub\Neuro\Neuro\Optimizers\SGD.cs:line 19 at Neuro.Flow.Optimize(OptimizerBase optimizer, Loss[] losses) in E:\GitHub\Neuro\Neuro\Models\Flow.cs:line 76 at Neuro.NeuralNetwork.Optimize(OptimizerBase optimizer, Loss loss) in E:\GitHub\Neuro\Neuro\NeuralNetwork.cs:line 91 at Neuro.PerfTests.SimpleNetPerfTests.Main(String[] args) in E:\GitHub\Neuro\Neuro.PerfTests\SimpleNetPerfTests.cs:line 31