invalid response during transfer

[ChiefWizzard]

I use a DAPlink to program py32f0 processors. It works with pyocd. When I issue the list command with edgb I get the following reply:

C:\ruudwork\info\Puya\ataradov CLI programmer for DAP>edbg --list
Attached debuggers:
0: 07000000323391aa073932363836374da5a5a5a597969908 - ARM CMSIS-DAP (1)

So I assume it recognizes the daplink debugger.
However when I issue a command like --erase or --read I get the following response error.

C:\ruudwork\info\Puya\ataradov CLI programmer for DAP>edbg -b -r -t py32f0 -c 10000
Debugger: ARM CMSIS-DAP 07000000323391aa073932363836374da5a5a5a597969908 1.10 (S, 1)
Using CMSIS-DAP v1
Clock frequency: 10.0 MHz
Error: invalid response during transfer (count = 0/1, status = 7)

Any idea what is causing this ?
Regards,
Ruud

[ataradov]

First of all, lower the clock a lot, like -c 100.
This is not a debugger issue, status = 7 comes from the target, it means that the SWDIO like remained high, so the target did not respond . This is the same status you will see if you disconnect the target entirely.