# Is there a temporary problem on firmware builder?
**URL:** https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955
**Category:** Firmware Builder
**Created:** [8 June 2022 12:46 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955 "2022-06-08T12:46:12Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [8 June 2022 12:46 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/1 "2022-06-08T12:46:12Z")
Since I upgraded my Ender3 V2 to 350mm high, I created two firmwares on 19th and 23th of May, when I had no filament runout sensor. Both firmwares are okay with 4.2.7 board.
Now I got filament runout sensor and want to create a new firmware, I always get Error without explaination, compiling fails.
May I ask if there is a temporary problem on servers /builders?
Thanks for help.
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [8 June 2022 12:59 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/2 "2022-06-08T12:59:10Z")
Yes. There is currently a problem with the ProUI code that causes the compile to fail.
I’m looking for a temporary fix until it is fixed properly in the Marlin repo.
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [8 June 2022 13:04 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/3 "2022-06-08T13:04:10Z")
I may have found a fix in the meantime. Can you try building a custom firmware now and see if it works ok?
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### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [8 June 2022 13:21 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/4 "2022-06-08T13:21:15Z")
Okay, compiling success, but printer is busy for next 7 hours. I can not check right now if the firmware works. I’ll report it later.
Thanks for your concern and support.
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### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [8 June 2022 19:07 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/5 "2022-06-08T19:07:31Z")
Unfortunately printer can not see the file as firmware and it can’t be uploaded to printer.
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [8 June 2022 23:33 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/6 "2022-06-08T23:33:22Z")
Try the normal troubleshooting - rename the file to a different filename, try reformatting the SD Card etc etc
See the **Flashing Firmware** section of the [Ender 3 V2 FAQ](https://marlin.crc.id.au/forum/t/ender-3-v2-frequently-asked-questions/17).
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### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [9 June 2022 06:51 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/7 "2022-06-09T06:51:32Z")
I already tried all of them. Firmwares, dated 19th and 23th May can be uploaded but the latest ona can not.
Well, I’m not in rush. 🙂 I had no runout sensor for more than one year, it may wait a little bit longer. I’ll try time to time. I’ll be in touch.
Many thanks for support.
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### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [12 June 2022 16:19 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/8 "2022-06-12T16:19:08Z")
Well, today I built a new firmware, compiling okay, uploading to printer okay but can not print. When I choose a file “thumbnail not found” appears. Can’t be seen but seems there is a confirm/Cancel screen background, only frames appears when I wheel the button. What do I do wrong?
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [12 June 2022 16:46 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/9 "2022-06-12T16:46:23Z")
Recently, support for G-Code thumbnail images was added to the UI.
Even if you don’t use OctoPrint - this link has guides on how to set that up for each slicer:
> **[Slicer Thumbnails](https://plugins.octoprint.org/plugins/prusaslicerthumbnails/)**
>
> Slicer Thumbnails
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### Author:  [@VolkanOvun](https://marlin.crc.id.au/forum/u/VolkanOvun)
#### Post date: [13 June 2022 15:48 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/10 "2022-06-13T15:48:01Z")
I did explained procedure for Cura and created a post processing script.
Still “Thumbnail not found” appears and printer waits. In case I turn the button counterclockwise, a rectangle jumps from right to left, and printer starts to proceed printing when I press the button.
What is written in rectangles in right/left sides, I don’t know, probably “cancel/confirm” or “abort/contuniue”.
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [14 June 2022 00:29 UTC](https://marlin.crc.id.au/forum/t/is-there-a-temporary-problem-on-firmware-builder/955/11 "2022-06-14T00:29:34Z")
Let me try and chase this up and see what I can find…
Have you tried the MarlinUI builds in the meantime? They might be more suitable long term…