# Week1 Assignment 3 Exercise 2, Unclear Error Message **URL:** \ **Category:** Sequence Models\ **Tags:** coursera-platform\ **Created:** [December 10, 2023, 10:56am UTC](https://community.deeplearning.ai/t/week1-assignment-3-exercise-2-unclear-error-message/515226 "2023-12-10T10:56:18Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Yuhan\_Chen](https://avatars.discourse-cdn.com/v4/letter/y/6f9a4e/32.png) [@Yuhan\_Chen](https://community.deeplearning.ai/u/Yuhan_Chen)\ **Post date:** [December 10, 2023, 10:56am UTC](https://community.deeplearning.ai/t/week1-assignment-3-exercise-2-unclear-error-message/515226/1 "2023-12-10T10:56:18Z")
Dear course mentors, ## When running the unit test for excercise 2, the following error message showed up: AttributeError Traceback (most recent call last) in 2 3 # UNIT TEST ----\> 4 inference\_summary = summary(inference\_model) 5 comparator(inference\_summary, music\_inference\_model\_out) ~/work/W1A3/test\_utils.py in summary(model) 34 result = 35 for layer in model.layers: —\> 36 descriptors = [layer. **class**. **name** , layer.output\_shape, layer.count\_params()] 37 if (type(layer) == Conv2D): 38 descriptors.append(layer.padding) /opt/conda/lib/python3.7/site-packages/tensorflow/python/keras/engine/base\_layer.py in output\_shape(self) 2190 'ill-defined for the layer. ’ 2191 'Use `get_output_shape_at(node_index)` ’ → 2192 ‘instead.’ % self.name) 2193 2194 @property AttributeError: The layer “lstm” has multiple inbound nodes, with different output shapes. Hence the notion of “output shape” is ill-defined for the layer. Use `get_output_shape_at(node_index)` instead. As I proceed to the next cell (check the inference model), the results was exactly the same as expected results ---
**Author:** ![Yuhan\_Chen](https://avatars.discourse-cdn.com/v4/letter/y/6f9a4e/32.png) [@Yuhan\_Chen](https://community.deeplearning.ai/u/Yuhan_Chen)\ **Post date:** [December 10, 2023, 11:11am UTC](https://community.deeplearning.ai/t/week1-assignment-3-exercise-2-unclear-error-message/515226/2 "2023-12-10T11:11:37Z")
This problem can be solved by restart the kernel and run all the cells from the beginning again. Sorry that i found the solution in the forum later but i did not find the button for closing the topic ---
**Author:** ![TMosh](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/tmosh/32/9321_2.png) [@TMosh](https://community.deeplearning.ai/u/TMosh)\ **Post date:** [December 10, 2023, 7:37pm UTC](https://community.deeplearning.ai/t/week1-assignment-3-exercise-2-unclear-error-message/515226/3 "2023-12-10T19:37:37Z")
Thanks for your report. I will close the thread. ---
**Author:** ![TMosh](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/tmosh/32/9321_2.png) [@TMosh](https://community.deeplearning.ai/u/TMosh)\ **Post date:** [December 10, 2023, 7:37pm UTC](https://community.deeplearning.ai/t/week1-assignment-3-exercise-2-unclear-error-message/515226/4 "2023-12-10T19:37:40Z")
Closed on December 10, 2023, 7:37pm UTC