NotImplementedError: Cannot convert a symbolic Tensor (truediv_4:0) to a numpy array.

[nehasaraf1994]

Hello. While training in the first epoch itself, I keep getting this error:

File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 767, in on_epoch yield epoch_logs File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 342, in fit total_epochs=epochs) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 181, in run_one_epoch step += 1 File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/contextlib.py", line 119, in exit next(self.gen) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 789, in on_batch self.progbar.on_batch_end(step, batch_logs) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/callbacks.py", line 781, in on_batch_end self.progbar.update(self.seen, self.log_values) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/utils/generic_utils.py", line 559, in update avg = np.mean(self._values[k][0] / max(1, self._values[k][1])) File "<array_function internals>", line 6, in mean File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 3335, in mean out=out, **kwargs) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/_methods.py", line 135, in _mean arr = asanyarray(a) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/_asarray.py", line 138, in asanyarray return array(a, dtype, copy=False, order=order, subok=True) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 728, in array " array.".format(self.name)) NotImplementedError: Cannot convert a symbolic Tensor (truediv_2:0) to a numpy array.

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "train.py", line 279, in main() File "train.py", line 276, in main history = parallel_model.fit(train_data_generator, epochs=FLAGS.max_epochs, steps_per_epoch=train_samples_count/FLAGS.batch_size, callbacks=callbacks, verbose=1) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training.py", line 819, in fit use_multiprocessing=use_multiprocessing) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 397, in fit prefix='val_') File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/contextlib.py", line 130, in exit self.gen.throw(type, value, traceback) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 772, in on_epoch self.progbar.on_epoch_end(epoch, epoch_logs) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/callbacks.py", line 789, in on_epoch_end self.progbar.update(self.seen, self.log_values) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/keras/utils/generic_utils.py", line 559, in update avg = np.mean(self._values[k][0] / max(1, self._values[k][1])) File "<array_function internals>", line 6, in mean File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 3335, in mean out=out, **kwargs) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/_methods.py", line 135, in _mean arr = asanyarray(a) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/numpy/core/_asarray.py", line 138, in asanyarray return array(a, dtype, copy=False, order=order, subok=True) File "/Users/nesaraf/Desktop/tf2Env/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 728, in array " array.".format(self.name)) NotImplementedError: Cannot convert a symbolic Tensor (truediv_4:0) to a numpy array.

Not able to figure out why? Please let me know.

[Benrflanders]

Hello @nehasaraf1994, were you able to solve this error? I'm having the same error come up.

I've tried changing verbose output to 0, but end up with the system exiting with code "Killed: 9."