Replying in the hopes that this will help someone else.
Was having nearly the same error with Dante Firmware Update Manager while trying to update a BSS/Harmon Soundweb BLU-326.
The updater would show:
“Updating (1/1): Get File”. then “Error: download error” with a popup saying “All devices failed to upgrade”.
Ultimately it seems that Windows Firewall was the problem. Temporarily disabled the firewall and the update went right through! It would be really helpful if the Dante FUM offered any useful error messages, logs or troubleshooting help. I also connected through a switch, but that did not help on its own.
BLU-326 (now the BLU-326DA).
Manufacturer: Harman International
Model Name: Soundweb London
Product Version: 1.0.0
Software Version: 1.0.0
Firmware Version: 1.0.2013.424
Original firmware:
Dante Model: Brooklyn II
Dante Firmware Version: 3.6.4.16
Hardware Version: 3.4.2.8
ROM/Boot version: 1.3.25
Here are versions listed after the successful update and a reboot of the Dante Card. The reboot option is offered in the last section of the Dante Controller Dante Updater 2.0.3 utility under “CONSULT MANUFACTURER”
…
Product Version: 1.2.0
Software Version: 1.0.0
Firmware Version: 1.7.2018.510
Original firmware:
Dante Model: Brooklyn II
Dante Firmware Version: 4.0.7.8
Hardware Version: 4.0.2.7
ROM/Boot version: 1.3.64
I wouldn’t have even gotten this far if not for the helpful info and device discovery tool on the KLANG site: How to recover and reset your Dante module's fixed IP settings - KLANG tool link: https://www.klang.com/assets/files/KLANG_DanteDiscovery_V1.0.zip
This gave the static IP info, which after setting our network adapter to match the subnet, allowed for connection to the unit.
We were starting with a used box that had a static ip address configured. Neither London or Audio Architect would offer the ip address of the Dante card, even though there are parameters for that. They just returned “not connected” or “inactive”. I should note that after upgrading the Dante card firmware, the parameters NOW show the correct values.
Good luck out there. I’m just starting on the Dante journey, and so far it’s amazing when it works, and maddening when it doesn’t.