# Unable to compile Ender 3 V2 -
**URL:** https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919
**Category:** Firmware Builder
**Created:** [15 October 2023 05:31 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919 "2023-10-15T05:31:51Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@DJ\_G](https://marlin.crc.id.au/forum/u/DJ_G)
#### Post date: [15 October 2023 05:31 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/1 "2023-10-15T05:31:51Z")
I am using the Firmware Builder but cannot compile firmware if I select “DWIN - Jyers UI” as the display.
Steps to recreate:
- Select Ender 3 V2 4.2.2 from builder
- Select DWIN - Jyers UI from the Display Section
- Build the firmware
Result: Marlin/src/HAL/STM32/…/…/inc/SanityCheck.h:2637:4: error: “Please select only one LCD controller option.”
Build Reference: faae2574
---
### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [16 October 2023 01:03 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/2 "2023-10-16T01:03:29Z")
I haven’t had a chance to dig into this yet - but if you select a different UI choice, does it work?
Just trying to give myself more info when I sit down to see what’s going on.
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### Author:  [@DJ\_G](https://marlin.crc.id.au/forum/u/DJ_G)
#### Post date: [16 October 2023 01:23 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/3 "2023-10-16T01:23:31Z")
Mixed results. I tried three other configurations with default settings. Only change being the display.
BTW, last time I compiled successfully with Jyers UI was 12/31/2022.
**Worked**
Build Reference: e0bbcfb0
Display: DWIN - Creality Stock
Build Reference: e0bbcfb0
Display: DWIN - Pro UI
**Didn’t Work**
Build Reference: ec33dede
Display: CR-10 Stock
Errors:
```auto
Marlin/src/HAL/STM32/../../inc/SanityCheck.h:2637:4: error: "Please select only one LCD controller option."
Marlin/src/HAL/STM32/../../inc/../HAL/STM32/inc/SanityCheck.h:84:6: error: "Serial Port 3 TX IO pins conflict with another pin on the board."
```
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [20 October 2023 08:51 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/4 "2023-10-20T08:51:43Z")
I think I’ve fixed this problem now - it was a conflict between the preset and the builder options which was causing two displays to be enabled - when it should only be one.
Can you please give this a go and see if it resolves the problem?
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### Author:  [@DJ\_G](https://marlin.crc.id.au/forum/u/DJ_G)
#### Post date: [28 October 2023 04:24 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/5 "2023-10-28T04:24:40Z")
Ran quick test without changing any options other than Display and it worked. Will post back if it breaks in another way. Thank you for fixing!
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### Author:  [@system](https://marlin.crc.id.au/forum/u/system)
#### Post date: [30 October 2023 04:24 UTC](https://marlin.crc.id.au/forum/t/unable-to-compile-ender-3-v2/1919/6 "2023-10-30T04:24:54Z")
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