I can't get imgcopy to work with a 1581 drive

[Dan Gahlinger]

I've tried Linux, Raspberry Pi and Windows 11 - using latest opencbm code from github
cbmctrl and d64copy both work perfectly fine with a 1541 drive
and cbmctrl works with the 1581 as well
but I can't get imgcopy to work
this is what I get on linux/raspberry Pi

imgcopy -drive-type=1581 8 disk.d81
[Warning] growing image file to 3200 blocks
Segmentation fault         (core dumped) imgcopy --drive-type=1581 8 disk.d81

I thought imgcopy could work with the 1541 as it lists the drive type, but when I tried, I got this:
imgcopy -v --drive-type=1541 --end-track=35 8 trydisk.d64
[Fatal] invalid drive or image type

And on windows 11 it starts up, but the drive stops spinning, with the light still green and the program exits without creating the image, the zoomfloppy LED continues to flash though

imgcopy -v --drive-type=1581 8 disk.d81
[Info] drive 08 (CBM-1581)
[Info] set transfer struc.
[Info] open source disk.
[Info] open destination.
[Warning] growing image file to 3200 blocks
[Info] open imagefile ok. disk.d81
[Info] copying tracks 1-80 (3200 sectors)

C:\opencbm-0.4.99.104\amd64>

--

Greetings from somewhere in the space-time continuum,

Dan.