System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> Newtonsoft.Json.JsonSerializationException: Could not create an instance of type Tensorflow.Keras.IRegularizer. Type is an interface or abstract class and cannot be instantiated. Path 'bias_regularizer.class_name'.
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewObject(JsonReader reader, JsonObjectContract objectContract, JsonProperty containerMember, JsonProperty containerProperty, String id, Boolean& createdFromNonDefaultCreator)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType)
at Newtonsoft.Json.Linq.JToken.ToObject(Type objectType, JsonSerializer jsonSerializer)
at Newtonsoft.Json.Linq.JToken.ToObject(Type objectType)
at Newtonsoft.Json.Linq.JToken.ToObject[T]()
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
--- End of inner exception stack trace ---
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
at Tensorflow.Keras.Utils.generic_utils.deserialize_keras_object(String class_name, JToken config) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Utils\generic_utils.cs:line 72
at Tensorflow.Keras.Saving.KerasObjectLoader._revive_layer_or_model_from_config(KerasMetaData metadata, Int32 node_id) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\KerasObjectLoader.cs:line 503
at Tensorflow.Keras.Saving.KerasObjectLoader._revive_from_config(String identifier, KerasMetaData metadata, Int32 node_id) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\KerasObjectLoader.cs:line 422
at Tensorflow.Keras.Saving.KerasObjectLoader._load_layer(Int32 node_id, String identifier, String metadata_json) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\KerasObjectLoader.cs:line 389
at Tensorflow.Keras.Saving.KerasObjectLoader.load_layers(Boolean compile) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\KerasObjectLoader.cs:line 79
at Tensorflow.Keras.Saving.SavedModel.KerasLoadModelUtils.load(String path, Boolean compile, LoadOptions options) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\SavedModel\load.cs:line 62
at Tensorflow.Keras.Saving.SavedModel.KerasLoadModelUtils.load_model(String filepath, IDictionary`2 custom_objects, Boolean compile, LoadOptions options) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Saving\SavedModel\load.cs:line 31
at Tensorflow.Keras.Models.ModelsApi.load_model(String filepath, Boolean compile, LoadOptions options) in C:\...\TensorFlow.NET\src\TensorFlowNET.Keras\Models\ModelsApi.cs:line 13
...etc.
Is there something I need to specify when I save to the SavedModel in my Python script to avoid this exception when loading in C#?
Or is this something I need to do while using the Tensorflow.NET bindings to let it ingest this model without issues?
Any help for this would be greatly appreciated.
Thank you!
Description
Hi,
I recently started using TensorFlow.NET and was trying to load my saved Keras model, but I get an exception thrown during model deserialization.
Specifically:
var model = tf.keras.models.load_model("TestModel", false);However, I get this error:
Stepping through the source (cloned from the project branch at commit 8775b0b), the exception seem to be thrown on Line 40 of
ConvolutionalArgs.csduring deserialization of config for my model'sbias_regularizerobject (of classL1L2) from its second layer (of classConv2D):I've tried to step further in TensorFlow.Keras and TensorFlow.Binding but I cannot find the cause.
The model I used is here:
TestModel.zip
Is there something I need to specify when I save to the SavedModel in my Python script to avoid this exception when loading in C#?
Or is this something I need to do while using the Tensorflow.NET bindings to let it ingest this model without issues?
Any help for this would be greatly appreciated.
Thank you!