Minicore and usbtiny

Hi have a Win11 machine , IDE 1.8.19 .
If I select UNO as the board type , USBtinyISP as the programmer and then load bootloader everything works fine .
If I select minicore AVR , 328 etc and USBtinyISP , I get the orange message ( paraphrase)
USBTiny found
USB permission denied
Error loading bootloader .

I can’t seem to find the issue , user account with admin authority , Any ideas ?

Hi @hammy. The problem is discussed here:

The reason you are getting different results when the Uno board is selected in Arduino IDE is because MiniCore uses a different version and build of AVRDUDE.

I think you can use the technique described here in the AVRDUDE wiki to fix the problem:

Thanks , I’ll give it a go

I didn’t manage to sort this out ( started to look tricky and windows 12 was being a pain ) so went down the Arduino as ISP and that worked fine

I'm glad you were able to find a workaround for the problem after all.

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