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Upgrading MMU2S to 1.0.5 with PrusaSlicer  

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cory.r4
(@cory-r4)
New Member
Upgrading MMU2S to 1.0.5 with PrusaSlicer

I just flashed the main board, no problems.  When I try to flash the MMU2S, this is all I get out of AVRDude...

Flashing Original Prusa MMU 2.0 Control, looking for VID/PID 0x2c99/3 or 0x2c99/4 ...
Found VID/PID 0x2c99/4 at `COM3`, rebooting the device ...
Error: open: Access is denied

So it obviously found COM3, and opened it already in order to read the VID/PID...but then Access is denied?  I've tried this with Slic3r PE itself, same issue.  I've done reboots, I've done uninstalls, I've done just about everything I can think of, which now includes coming to the forums.  Has anyone seen this behavior before?

While I'm sitting here still playing with it, I did notice something else.  Just after rebooting the Prusa, I can see a new COM port open up for 'Original Prusa i3 MK3 Multi Material 2.0 bootloader' on a wholly separate port, which dissapears after a few moments and shows 'Original Prusa i3 MK3 Multi Material 2.0 upgrade' instead.  Trying to flash during that brief moment gave me different results in AVR, but still no flashing (still reported the open as denied, however it got a lot further in the process).

Veröffentlicht : 23/05/2019 11:46 am
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