# Cursor Tab has no effect

**URL:** <https://forum.cursor.com/t/cursor-tab-has-no-effect/34368>\
**Category:** Bug Reports\
**Created:** [December 12, 2024, 12:19pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368 "2024-12-12T12:19:21Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 12, 2024, 12:19pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/1 "2024-12-12T12:19:21Z")

</div>

### Hi, thanks for reporting an issue with Cursor.

Before you report this, we’d appreciate if you can search this forum to see if this issue has already been reported.

If you have done so, please check this box.  
on

### Describe the Bug

Cursor Tab has no effect: I have turned off HTTP/2, but the problem is not solved. I have removed and reinstalled it, but it has not solved the problem.

The message seen from Developer Tools is as follows, which keeps appearing:

workbench.desktop.main.js:3019 Cpp: error Error: Illegal value for lineNumber  
at J.getLineMaxColumn (workbench.desktop.main.js:1274:160)  
at li.immediatelyFireCppWithSpecifiedPosition (workbench.desktop.main.js:4213:6557)  
at async li.immediatelyFireCppFromTrigger (workbench.desktop.main.js:4212:6674)  
at async li.fireCppSuggestionFromTrigger (workbench.desktop.main.js:4212:4432)

I’m logged in and subscribed to Pro. Please tell me how should I solve the problem I encountered?  
Thank you.

### Steps to Reproduce

Cursor Tab has no effect

### Expected Behavior

Cursor doesn’t predict my next cursor position and I can’t navigate the code seamlessly.

Everything was working very well before yesterday, but since yesterday there was no automatic prediction and tab function, which had a great impact on me. The Chat and Composer functions are still functioning normally.

### Screenshots / Screen Recordings

 ![Cursor-Error.png](https://us1.discourse-cdn.com/cursor1/original/2X/a/aee6ef8711e71c6a11939e9080002a6220df62f8.png)

### Operating System

Windows 10/11

### Current Cursor Version (Menu → About Cursor → Copy)

0.43.6  
1.93.1  
a846435528b4b760494a836f96f0739889253530  
Electron: 2024-12-06T05:11:55.168Z  
ElectronBuildId: 30.5.1  
Chromium: undefined  
Node.js: 124.0.6367.243  
V8: 20.16.0  
OS: 12.4.254.20-electron.0

### Additional Information

Everything was working very well before yesterday, but since yesterday there was no automatic prediction and tab function, which had a great impact on me. The Chat and Composer functions are still functioning normally.

### Does this stop you from using Cursor

Yes - Cursor is unusable

---

<div class="post-metadata">

**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\
**Post date:** [December 12, 2024, 12:22pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/2 "2024-12-12T12:22:02Z")

</div>

Hey, please provide this information:

> **[Cursor - Build Software Faster](https://docs.cursor.com/troubleshooting/troubleshooting-guide)**
>
> Built to make you extraordinarily productive, Cursor is the best way to code with AI.

Also, make sure you didn’t accidentally disable it.

 ![image](https://us1.discourse-cdn.com/cursor1/original/2X/5/5823fb48987067f6a04bb477ed5857a2a2aaf408.jpeg)

---

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 12, 2024, 12:30pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/3 "2024-12-12T12:30:09Z")

</div>

![Error-2024-12-12 202555](https://us1.discourse-cdn.com/cursor1/original/2X/3/393c3dc8040a112ad28cb88ccd59c08b070e2b17.png)  
 ![Error-2024-12-12 202731](https://us1.discourse-cdn.com/cursor1/original/2X/5/53558344d5bc88211cef8cb32a371042a95c6a8d.png)

---

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 12, 2024, 12:35pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/4 "2024-12-12T12:35:04Z")

</div>

![Error-2024-12-12 203309](https://us1.discourse-cdn.com/cursor1/original/2X/6/638b3728388ae6e590f3bd9ef06015f73244c8aa.png)

---

<div class="post-metadata">

**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\
**Post date:** [December 12, 2024, 12:46pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/5 "2024-12-12T12:46:10Z")

</div>

Could you take a screenshot of the output in the `Cursor > Terminal > Output` menu and select Cursor Tab from the dropdown menu?

---

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 12, 2024, 12:57pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/6 "2024-12-12T12:57:54Z")

</div>

Thank you.

 ![Error-2024-12-12 205635](https://us1.discourse-cdn.com/cursor1/original/2X/b/b24b36ae2abb344e35bcce003dab03fa339cd55b.png)

2024-12-12 20:56:13.121 [info] CURSOR LOG: requestId bfa44fd8-4d2d-45e6-b175-caae1b23bc8b  
2024-12-12 20:56:14.203 [info] CURSOR LOG: Done streaming cpp with id bfa44fd8-4d2d-45e6-b175-caae1b23bc8b  
2024-12-12 20:56:14.203 [info] CPP RT LOG: Time taken for streaming cpp 1082.015625 with request bfa44fd8-4d2d-45e6-b175-caae1b23bc8b  
2024-12-12 20:56:14.203 [info] CPP Request Log with id bfa44fd8-4d2d-45e6-b175-caae1b23bc8b  
2024-12-12 20:56:14.203 [info] =======\>Model output  
如果需要處理跨日或 end\_time 小於 begin\_time 的情況，需要額外的邏輯處理。  
“”"

2024-12-12 20:56:14.203 [info] =======\>Debug stream time 253.14390700031072  
2024-12-12 20:56:14.203 [info] =======\>Debug ttft time 251.28317299950868  
2024-12-12 20:56:14.203 [info] Average of latest 20 ttft time 228.01655929994303  
2024-12-12 20:56:14.203 [info] Average of latest 20 stream time 230.41477624996332  
2024-12-12 20:56:14.203 [info] Average of latest 20 total time NaN  
2024-12-12 20:56:14.204 [info] Average of latest 20 client time 676.2933959960938  
2024-12-12 20:56:14.204 [info] Average of latest 20 discrepencies NaN  
2024-12-12 20:56:14.204 [info] CPP RT LOG: All stats {“streamingtime”:1082.015625,“actualTtftFromStart”:1135.821533203125,“timeTillServerRequest”:54.982177734375,“requestToTtft”:1080.83935546875,“totalTime”:1136.97802734375}  
2024-12-12 20:56:17.848 [info] CURSOR LOG: requestId b1035598-5eec-4281-9f4c-4b77eca552ff  
2024-12-12 20:56:18.430 [info] CURSOR LOG: Done streaming cpp with id b1035598-5eec-4281-9f4c-4b77eca552ff  
2024-12-12 20:56:18.430 [info] CPP RT LOG: Time taken for streaming cpp 583.001953125 with request b1035598-5eec-4281-9f4c-4b77eca552ff  
2024-12-12 20:56:18.430 [info] CPP Request Log with id b1035598-5eec-4281-9f4c-4b77eca552ff  
2024-12-12 20:56:18.430 [info] =======\>Model output  
“”"

```
# 將時間字串轉換為小時、分鐘、秒
end_h, end_m, end_s = map(int, end_time.split(':'))
begin_h, begin_m, begin_s = map(int, begin_time.split(':'))

```

2024-12-12 20:56:18.430 [info] =======\>Debug stream time 296.88260299991816  
2024-12-12 20:56:18.430 [info] =======\>Debug ttft time 295.35460099997  
2024-12-12 20:56:18.431 [info] Average of latest 20 ttft time 230.25456619993784  
2024-12-12 20:56:18.431 [info] Average of latest 20 stream time 232.30637714994373  
2024-12-12 20:56:18.431 [info] Average of latest 20 total time NaN  
2024-12-12 20:56:18.431 [info] Average of latest 20 client time 651.186279296875  
2024-12-12 20:56:18.431 [info] Average of latest 20 discrepencies NaN  
2024-12-12 20:56:18.432 [info] CPP RT LOG: All stats {“streamingtime”:583.001953125,“actualTtftFromStart”:630.282470703125,“timeTillServerRequest”:56.136962890625,“requestToTtft”:574.1455078125,“totalTime”:639.08837890625}

---

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 12, 2024, 1:10pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/7 "2024-12-12T13:10:37Z")

</div>

I found that if it was in an ipynb program file that was already under development and had accumulated some code, the tab and prediction functions were lost. If I reopen a new ipynb program file, the tab and prediction functions are normal. Please help us examine why there is such a discrepancy.  
Thank you for your help.

---

<div class="post-metadata">

**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\
**Post date:** [December 12, 2024, 2:34pm UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/8 "2024-12-12T14:34:59Z")

</div>

We’ll look into it.

---

<div class="post-metadata">

**Author:** ![Ike](https://avatars.discourse-cdn.com/v4/letter/i/df705f/32.png) [@Ike](https://forum.cursor.com/u/Ike)\
**Post date:** [December 15, 2024, 4:18am UTC](https://forum.cursor.com/t/cursor-tab-has-no-effect/34368/9 "2024-12-15T04:18:10Z")

</div>

My Cursor has recovered its function in the past two days. Although when editing files with a lot of code, sometimes it still fails to display the prompt properly, but most of the time it can function normally, which is much better than when it was completely useless.

Thank you for your help, I will continue to subscribe to Pro and support Cursor products.