ISSUE HAS NOW BEEN RESOLVED, see edit after main text.
Hello there folks.
I've recently acquired a Lofi-12 and I'm attempting to update the firmware from version 2.0.55 to 2.1.65, but I get a "SysEx: No Buffers Available" error message when trying to transfer the SysEx update file using MIDI-OX (version 7.0.2).
I am using a PreSonus Studio 1824 audio interface which shows up in MIDI-OX.
I've followed the official instructions from the Sonicware website on setting up MIDI-OX and the SysEx settings under "Configure" (Size 256 Num 32). I've started the Lofi-12 while holding shift so it says "UPDT" on the screen and it's connected via a cable going from the soundcard MIDI output into the unit's MIDI input.
I am on Windows 11 (version 26H2 released 30th of September 2026).
I've looked around online and I saw someone writing about a possible "device access permission" issue after a Windows security update (KB5077181) in January 2026, affecting "buffer management" for MIDI drivers. I've looked through my update history and I've already uninstalled that security update because of some other issues I had earlier this year. Is it possible that the 26H2 update has caused some similar error, or are there other Windows updates that are known to affect things like this? Could it be some issue with my specific audio interface?
Any tips on how to solve this issue are highly appreciated.
EDIT:
I've managed to update the Lofi-12 now by using a free software called Bome Send SX instead of MIDI-OX.
Here's a link to it.
https://www.bome.com/products/sendsx