Traceback (most recent call last):


 "/home/pavlin/dev/orange3/Orange/canvas/scheme/widgetsscheme.py", line 1083, in process_signals_for_widget

widget.handleNewSignals()


 "/home/pavlin/dev/orange3/Orange/widgets/visualize/utils/widget.py", line 453, in handleNewSignals

self.commit()


 "/home/pavlin/dev/orange3/Orange/widgets/gui.py", line 2042, in unconditional_commit

do_commit()


 "/home/pavlin/dev/orange3/Orange/widgets/gui.py", line 2050, in do_commit

commit()


 "/home/pavlin/dev/orange3/Orange/widgets/unsupervised/owtsne.py", line 253, in commit

super().commit()


 "/home/pavlin/dev/orange3/Orange/widgets/visualize/utils/widget.py", line 511, in commit

self.send_data()


 "/home/pavlin/dev/orange3/Orange/widgets/visualize/utils/widget.py", line 516, in send_data

group_sel = np.zeros(len(data), dtype=int)
TypeError: object of type 'NoneType' has no len()

Traceback (most recent call last):


 "Project/U-Net/Training/continue_training_val_weights.py", line 128, in <module>

callbacks=[chk, logger])


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/legacy/interfaces.py", line 91, in wrapper

return func(*args, **kwargs)


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/engine/training.py", line 1418, in fit_generator

initial_epoch=initial_epoch)


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/engine/training_generator.py", line 217, in fit_generator

class_weight=class_weight)


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/engine/training.py", line 1217, in train_on_batch

outputs = self.train_function(ins)


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py", line 2715, in __call__

return self._call(inputs)


 "/usr/local/anaconda/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py", line 2675, in _call

fetched = self._callable_fn(*array_vals)


 "/usr/local/anaconda/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 1454, in __call__

self._session._session, self._handle, args, status, None)


 "/usr/local/anaconda/lib/python3.6/site-packages/tensorflow/python/framework/errors_impl.py", line 519, in __exit__

c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors_impl.ResourceExhaustedError: OOM when allocating tensor with shape[7,128,128,256] and type float on /job:localhost/replica:0/task:0/device:GPU:0 by allocator GPU_0_bfc
