Getting an error with a multi-input Keras model related to the input dimension

Question

I have a multi input Keras model. Here the inputs:

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Answer 1

try

train_x_list = [tf.squeeze(tx) for tx in tf.split(train_x, num_or_size_splits=train_x.shape[0], axis=0)]

it will produce a list of tensors with training data split along dimension 0. Then use your second solution, feeding the list to fit().