# BC127 Melody Upgrade Issue

**URL:** <https://forum.sierrawireless.com/t/bc127-melody-upgrade-issue/9518>\
**Category:** WiFi and Bluetooth Modules\
**Created:** [September 27, 2017, 11:17am UTC](https://forum.sierrawireless.com/t/bc127-melody-upgrade-issue/9518 "2017-09-27T11:17:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![peteh](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@peteh](https://forum.sierrawireless.com/u/peteh)\
**Post date:** [September 27, 2017, 11:17am UTC](https://forum.sierrawireless.com/t/bc127-melody-upgrade-issue/9518/1 "2017-09-27T11:17:03Z")

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Hi I am trying to upgrade a BC127 Melody version 6.0.46 using the firmware upgrade tool v4.0.1.0, however I am getting an error reported.

I can connect to the device and it reports the version and build and date, but when I try and download a new version of the firmware it tells me it is “rebooting to DFU mode” then displays Error 88 “failcom\_connect”.

The unit is not “bricked” and I can repeat this process, unfortunately it just repeats the same steps as above.

I am using Windows 10 on a virtual machine, but I have used a previous version of the upgrade tool to upgrade to another BC127 to an earlier version of Melody on this virtual machine.

If anyone has any suggestions I would appreciate it.

Thanks

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**Author:** ![letter82](https://avatars.discourse-cdn.com/v4/letter/l/eb9ed0/32.png) [@letter82](https://forum.sierrawireless.com/u/letter82)\
**Post date:** [April 4, 2018, 4:39pm UTC](https://forum.sierrawireless.com/t/bc127-melody-upgrade-issue/9518/2 "2018-04-04T16:39:04Z")

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I am having this same issue with the latest version of firmware. I am attempting to update the firmware from version 6.1.5 to version 6.0.33. I am able to connect to the com port and see the version of melody audio and build number, but when I attempt to download, it shows “rebooting to DFU mode”, then “waiting for finish download”, followed by “Error 88 " failcom\_connect”.

I am using Melody firmware update tool v3.0.4.0, and I cannot find the latest version of the upgrade tool anywhere. Can somebody please respond with some info on the location for the updated frimware tool, and any information that might help resolve this? Thanks.

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**Author:** ![mlw](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/mlw/32/3706_2.png) [@mlw](https://forum.sierrawireless.com/u/mlw)\
**Post date:** [April 9, 2018, 9:38am UTC](https://forum.sierrawireless.com/t/bc127-melody-upgrade-issue/9518/3 "2018-04-09T09:38:38Z")

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Pete,

For the record I have discussed this in the below posting.

> [@BC127 downgrade firmware](https://forum.sierrawireless.com/t/bc127-downgrade-firmware/12322):
>
> I have an existing prototype that we have been using over the past couple years, and I am having a problem with the newest batch of BC127 modules I received. They were shipped with version V6.1.5 of the firmware (all our other units have V6.0.33 of the firmware). They are not functioning the same as the units with the older firmware, and we would like to downgrade to the older version, for various reasons. I have Melody Upgrade Tool v3.0.4.0. This app has always worked in the past with upgradi…

Regards

Matt