# Problems with 1.2.1 flash update **URL:** \ **Category:** Troubleshooting (X35/X50)\ **Created:** [March 4, 2023, 4:10am UTC](https://forum.onefinitycnc.com/t/problems-with-1-2-1-flash-update/19185 "2023-03-04T04:10:20Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![WaywardWoodworker](https://avatars.discourse-cdn.com/v4/letter/w/e79b87/32.png) [@WaywardWoodworker](https://forum.onefinitycnc.com/u/WaywardWoodworker)\ **Post date:** [March 4, 2023, 4:36am UTC](https://forum.onefinitycnc.com/t/problems-with-1-2-1-flash-update/19185/2 "2023-03-04T04:36:02Z")
If you used the “upgrade to 1.2.1” option on the controller from 1.1.1 I would point you in the direction of re-flashing the SD-card following these instructions: > [@How to reflash the operating system on the Onefinity BB controller (Full SD card image)](https://forum.onefinitycnc.com/t/how-to-reflash-the-operating-system-on-the-onefinity-full-sd-card-image/5659): > > There are times when you may have a file go corrupt or (advanced) users start poking under the hood and may need to reflash the entire vanilla image to the sd card. This process is essentially reinstalling the Onefinity operating system from scratch. This process is only for advanced users OR if you were directed to this via support. If you are looking to update the firmware from a controller that is working properly, do not use this method, look for the update file in the ‘firmware updates’ s… According to the upgrade info on this site the only permitted way to upgrade from 1.1, 1.1.1 or 1.1.2 is via a full re-flash of the SD-card. **Important notes:** - If you are already on 1.1, 1.1.1, or 1.1.2, you **MUST do a full ‘reflash’ of the SD card to 1.2.1** (this involves removing the sd card and flashing via a computer. More details here: [How to reflash the operating system on the Onefinity (Full SD card image)](https://forum.onefinitycnc.com/t/how-to-reflash-the-operating-system-on-the-onefinity-full-sd-card-image/5659) [Full SD Image](https://github.com/OneFinityCNC/onefinity-firmware/releases/download/v.1.2.1/onefinity-raspi-1.2.1.img.xz) > [@Onefinity CNC Firmware 1.2.1 (2/8/23) (X-35/X-50 machines w/ Buildbotics Controller) (Outdated)](https://forum.onefinitycnc.com/t/onefinity-cnc-firmware-1-2-1-2-8-23-x-35-x-50-machines-w-buildbotics-controller-most-recent/18655): > > Firmware 1.2.1 releases today (2/8/2023) for all X-35/X-50 Onefinity machines with the buildbotics controller. (does not apply to elite series) A little background. Firmware 1.0.9 was the longest running firmware we’ve had up since release. It was solid, relatively bug free and very stable. We worked hard on 1.1.0-1.1.1-1.1.2 to add many new features and build on future additions to the firmware. We did private beta testing and in house, everything worked great. We gave it to a hand full of t… --- _[View the full topic](https://forum.onefinitycnc.com/t/problems-with-1-2-1-flash-update/19185)._