Rowley works fine with ST-Link on the Due
I tried Pickit4. Neither Rowley or AS7 worked.
I have not tried SNAP since Pickit4 failed.
I know that ATMEL-ICE works in AS7, Rowley, Keil on the Due.
Rowley connects fine to the M0 via ST-Link. But then whinges about locked memory on the SAMD21.
I am not particularly worried about the M0 because I have the M0 Pro for development.
I presume that all the MKR owners have discovered convenient ways to develop code.
David.