# An issue with practice lab 3 **URL:** \ **Category:** Supervised ML: Regression and Classification\ **Tags:** week-module-3\ **Created:** [July 26, 2023, 6:38pm UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147 "2023-07-26T18:38:08Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Azzam\_Almadini](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Azzam\_Almadini](https://community.deeplearning.ai/u/Azzam_Almadini)\ **Post date:** [July 26, 2023, 6:38pm UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/1 "2023-07-26T18:38:08Z")
In this lab, it always shows errors for me. For example, the name ‘w’ is not defined. So, how can I solve this problem? ---
**Author:** ![elirod](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/elirod/32/55842_2.png) [@elirod](https://community.deeplearning.ai/u/elirod)\ **Post date:** [July 26, 2023, 6:46pm UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/2 "2023-07-26T18:46:34Z")
Hi @Azzam_Almadini Welcome to the community. That output is reporting that you are trying to access a variable that was not define previously. Make sure that you run de cell code that is related to it and try do run the current code again. Best regards ---
**Author:** ![Azzam\_Almadini](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Azzam\_Almadini](https://community.deeplearning.ai/u/Azzam_Almadini)\ **Post date:** [July 26, 2023, 7:54pm UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/3 "2023-07-26T19:54:30Z")
I have done this before, but it shows the same error! ---
**Author:** ![elirod](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/elirod/32/55842_2.png) [@elirod](https://community.deeplearning.ai/u/elirod)\ **Post date:** [July 26, 2023, 8:00pm UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/4 "2023-07-26T20:00:34Z")
Oh, O.K. In order to prevent any cache in your browser we can try a basic troubleshooting workflow. Try the follow: 1. Restart your browser, clear your browser cache, or try a different browser. 2. Use a different network connection. 3. Check if the firewall, proxy, or antivirus software is blocking the connection. 4. Temporarily turn off all browser extensions, and then try again. Let me know the results as soon as you complete. Thanks! ---
**Author:** ![saifkhanengr](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/saifkhanengr/32/152858_2.png) [@saifkhanengr](https://community.deeplearning.ai/u/saifkhanengr)\ **Post date:** [July 27, 2023, 3:11am UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/5 "2023-07-27T03:11:47Z")
You can try this too: Kernel → Restart kernel and clear output and then run all the cells. ---
**Author:** ![Gideon\_Jesse\_Slabber](https://avatars.discourse-cdn.com/v4/letter/g/db5fbb/32.png) [@Gideon\_Jesse\_Slabber](https://community.deeplearning.ai/u/Gideon_Jesse_Slabber)\ **Post date:** [July 27, 2023, 6:19am UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/6 "2023-07-27T06:19:54Z")
Hi , hope you are well! I replied yesterday with a question you had asked me, but I have not received any reply yet from you ---
**Author:** ![saifkhanengr](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/saifkhanengr/32/152858_2.png) [@saifkhanengr](https://community.deeplearning.ai/u/saifkhanengr)\ **Post date:** [July 27, 2023, 7:26am UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/7 "2023-07-27T07:26:49Z")
Whom are you addressing? Please respond in the same place where you have already posted your reply. ---
**Author:** ![Gideon\_Jesse\_Slabber](https://avatars.discourse-cdn.com/v4/letter/g/db5fbb/32.png) [@Gideon\_Jesse\_Slabber](https://community.deeplearning.ai/u/Gideon_Jesse_Slabber)\ **Post date:** [July 27, 2023, 8:09am UTC](https://community.deeplearning.ai/t/an-issue-with-practice-lab-3/398147/8 "2023-07-27T08:09:58Z")
Hi Saif I was replying to you.