when I add a masking layer in my model, it gives this error. works fine without the masking tho. If anyone can solve this, id be grateful ! been scratching my head for 3 days now. TensorFlow 2.17 def build_lstm(examples): print("Building Model") X_train = examples[:, :-1, :] y_train = examples[:, 1:, :] model = Sequential() model.add(Masking(mask_value=0.0, input_shape=(X_train.shape[1], X_train.shape[2]))) model.add(LSTM(128, return_sequences=True, kernel_regularizer=l2(0.001), kernel_initializer=GlorotUniform())) model.add(LayerNormalization()) model.add(Dropout(0.1)) model.add(LSTM(256, return_sequences=True, kernel_regularizer=l2(0.001))) model.add(Dropout(0.1)) #model.add(Lambda(lambda x: x, mask=None)) model.add(TimeDistributed(Dense(y_train.shape[2], kernel_regularizer=l2(0.001)))) #adadelta scheduler = ReduceLROnPlateau(monitor='loss', factor=0.5, patience=5, verbose=1) early_stopping = EarlyStopping(monitor='loss', patience=5, restore_best_weights=True) model.compile(loss=MeanSquaredError(), optimizer=Adam(learning_rate=0.00001, clipvalue=1.0),metrics=[MeanSquaredError(), MeanAbsoluteError(),r2_metric,'RootMeanSquaredError']) print("Training Model") history = model.fit(X_train, y_train, batch_size=64, epochs=30, callbacks=[scheduler, early_stopping]) print("Training complete. Returning Model") return model, history Here is the complete error: OperatorNotAllowedInGraphError: Exception encountered when calling TimeDistributed.call(). Using a symbolic `tf.Tensor` as a Python `bool` is not allowed. You can attempt the following resolutions to the problem: If you are running in Graph mode, use Eager execution mode or decorate this function with @tf.function. If you are using AutoGraph, you can try decorating this function with @tf.function. If that does not work, then you may be using an unsupported feature or your source code may not be visible to AutoGraph. See https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/autograph/g3doc/reference/limitations.md#access-to-source-code for more information. Arguments received by TimeDistributed.call(): • inputs=tf.Tensor(shape=(None, 13, 256), dtype=float32) • training=True • mask=tf.Tensor(shape=(None, 13), dtype=bool) Continue reading...