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Unable to create microcontroller ARD.ATMEGA.BL0055 - definition file missing or corrupt
Posted: Fri May 23, 2025 9:02 pm
by andeug
Hi,
I am getting a strange error on Windows 11 after installing Flowcode and I don't know how to fix this:
"Unable to create microcontroller ARD.ATMEGA.BL0055 as the definition file ARD.ATMEGA.BL0055.FCD is missing or corrupt."
The error appears immediately after I start FC and trying to select the template "Arduino (BL0055) + Combo (BL0114)" with the two Eblocks2 boards which I own.
Andreas

- Screenshot 2025-05-23 220022.png (15.48 KiB) Viewed 240 times
Re: Unable to create microcontroller ARD.ATMEGA.BL0055 - definition file missing or corrupt
Posted: Sat May 24, 2025 11:58 am
by andeug
I get exactly the same error when I am trying to open the file called "Arduino (BL0055) + Combo (BL0114).fcfx", which is located on C:\Program Files (x86)\Flowcode v10\DefaultData\FlowcodeV10\Misc\Templates\E-Blocks 2

- Screenshot 2025-05-24 125443.png (155.7 KiB) Viewed 212 times
Any of those upper files are opening without any error, and it's only the Arduino (BL0055) + Combo (BL0114) that gives me the error.
I uninstalled Flowcode and its drivers a few times and got the same window regarding ARD.ATMEGA.BL0055.fcd file missing or corrupt. I was not able to locate this file on my computer neither, so it's probably missing.
Can someone please share its content and location, so that I can add it to my installation and try to see if it works?
Re: Unable to create microcontroller ARD.ATMEGA.BL0055 - definition file missing or corrupt
Posted: Sat May 24, 2025 12:34 pm
by chipfryer27
Hi
Problem appears to be with the latest BL0055 update.
I created a simple chart with both the 55' and combo board, saved and could open without issue. Flowcode informed of an update to the 55' and I downloaded. This caused problems similar to yours.
Rolling back the BL0055 to v3 solved the problem.

- Screenshot 2025-05-24 063151.jpg (16.01 KiB) Viewed 203 times
If you roll back until Matrix resolve the issue you should be good.
Regards
Re: Unable to create microcontroller ARD.ATMEGA.BL0055 - definition file missing or corrupt
Posted: Tue May 27, 2025 1:18 pm
by medelec35
Hello.
Many thanks for reporting this.
We will have an update as soon as we can.