The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9ef720ac38> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9eedc83a08> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9ef720ac38> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/ag/PycharmProjects/dv-predictor/flaskapp/train_module.py", line 87, in <module>
    verbose_eval=50
  File "/home/ag/anaconda3/envs/dv-predictor/lib/python3.6/site-packages/catboost/core.py", line 2701, in fit
    save_snapshot, snapshot_file, snapshot_interval)
  File "/home/ag/anaconda3/envs/dv-predictor/lib/python3.6/site-packages/catboost/core.py", line 1173, in _fit
    self._train(train_pool, eval_sets, params, allow_clear_pool)
  File "/home/ag/anaconda3/envs/dv-predictor/lib/python3.6/site-packages/catboost/core.py", line 866, in _train
    self._object._train(train_pool, test_pool, params, allow_clear_pool)
SystemError: <built-in method _train of _catboost._CatBoost object at 0x7f9ef7223990> returned a result with an error set

Process finished with exit code 1

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9ef720ac38> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9eedc83a08> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "_catboost.pyx", line 3024, in _catboost._CoutLogPrinter
  File "_catboost.pyx", line 1141, in _catboost.to_native_str
SystemError: <built-in method decode of bytes object at 0x7f9ef720ac38> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/ag/PycharmProjects/dv-route-time-predictor/flaskapp/train_module.py", line 87, in <module>
    verbose_eval=50
  File "/home/ag/anaconda3/envs/dv-route-time-predictor/lib/python3.6/site-packages/catboost/core.py", line 2701, in fit
    save_snapshot, snapshot_file, snapshot_interval)
  File "/home/ag/anaconda3/envs/dv-route-time-predictor/lib/python3.6/site-packages/catboost/core.py", line 1173, in _fit
    self._train(train_pool, eval_sets, params, allow_clear_pool)
  File "/home/ag/anaconda3/envs/dv-route-time-predictor/lib/python3.6/site-packages/catboost/core.py", line 866, in _train
    self._object._train(train_pool, test_pool, params, allow_clear_pool)
SystemError: <built-in method _train of _catboost._CatBoost object at 0x7f9ef7223990> returned a result with an error set

Process finished with exit code 1

cat_model = CatBoostRegressor(iterations=max_trees,
                              learning_rate=learning_rate,
                              loss_function=LatenessShare15min(),
                              # loss_function='RMSE',
                              eval_metric='RMSE',
                              # task_type='GPU'
                              l2_leaf_reg=l2_leaf_reg,
                              early_stopping_rounds=early_stopping_rounds,
                              use_best_model=True,
                              max_depth=max_depth
                              # rsm=0.1
                              )