Hi, thank you for reporting us this BUG. I'll fix it soon. :)

What's more, UWP will break down in clrcore while using V1 LoadSession function under new version, but not very sure, need more test. I will abandon UWP.

I have also experienced this error setting up a Conv1D layer:
Dim denseLayer5 = layers.Conv1D(64, kernel_size:=3, activation:="relu")
Dim denseOutput5 = denseLayer3.Apply(denseOutput4)

Here is a possible work around #976 (comment). I'll fix this BUG this weekend. Recently a little busy and forgot it🤣Sorry for that

#1049 partially fixed this problem. Note that tf.net support loading models with functions/concrete functions now but hasn't supported saving models with functions/concrete functions. The complete support for model saving would be added in 2 weeks. It's recommended to use model saving after loading (from model saved in python) after that.

Here is a possible work around #976 (comment). I'll fix this BUG this weekend. Recently a little busy and forgot it🤣Sorry for that

Can the mentioned workaround be added any time soon? The issue still persists when loading and saving keras model for the 2nd time, it throws:
System.ArgumentException: An item with the same key has already been added. Key: non_trainable_variables

can be reproduced e.g. using avaliable unit tests:

// build and save model
AlexnetFromSequential();
// load and save again
var model = tf.keras.models.load_model(@"./alexnet_from_sequential");

model.summary();


model.save("./saved_alexnet_from_sequential_after_loading"); // <- the ERROR