Can't load program / unable to run

[2ni]

I have a ATtiny84a. Everything worked until I tried to upload new code via debugwire:

Unconnected.                            > device tty.usbserial-AH06TDUZ
Connected to ATtiny84 on /dev/tty.usbserial10 at 30949 baud.
fffffffe: ffff                          > l src/main.elf
Loading 308 flash bytes from ELF text segment 0 to addresses $0 through $133.
SerialRead expected 256 bytes, received 112 bytes
64  64  d2  b5  d7  23  01  64  d2  b5  e7  23  00  64  d2  b5  f7  23  00  64  64  64  d2  b4  07  23  10  64  d2  b4  17  23  e0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  a0  64  d2  b4  17  23  e6  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  b0  64  d2  b4  17  23  e0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32
SerialRead expected 256 bytes, received 198 bytes
23  64  64  d2  b4  07  23  e4  64  d2  b4  17  23  e3  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  f1  64  d2  b4  17  23  e0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  03  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  c8  64  d2  b4  17  23  95  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  31  64  d2  b4  17  23  96  d0  00  00  64  d2  bf  64  64  d2  b5  d7  23  01  64  d2  b5  e7  23  00  64  d2  b5  f7  23  00  64  64  64  d2  b4  07  23  10  64  d2  b4  17  23  e0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2

Questions:

• What should I do next? quit and restart doesn't seem to work. The program is not running (or sth is running but not what should)
• Why is the application telling it's device dev/tty.usbserial10? There's no such device, only tty.usbserial-AH06TDUZ
• If I add baudrate, eg 9600 or any other value not around 30949 baud the device is not found at all, how come?
• I also tried with a CH340, but no device is found even /dev/tty.wchusbserial1420 is there :-(

Maybe someone can help me getting things going on?

[2ni]

Just a short update: I was able to update new code by switching to ISP mode with the command "qi" and updating fuses or software via ISP connector.

THIS APPEARS TO BE WRONG: Somehow the *.elf file was broken. I 1st checked to generate a correct elf file until uploading it via isp works. Now that file also can be uploaded with debugwire.

It seemed to work, because I uploaded the same elf. And then no error is thrown.
So seems that I can't upload a file via debugwire. No matter what I do (I even changed to a 1N4148 to be sure), I get some errors. This seems to somehow mess up the memory, as afterwards nothing works anymore. No reset, no go, no nothing...

0000: c010  rjmp  0022 (+17)            > l ../src/main.elf
Loading 88 flash bytes from ELF text segment 0 to addresses $0 through $57.
SerialRead expected 256 bytes, received 129 bytes
64  64  d2  b5  d7  23  01  64  d2  b5  e7  23  00  64  d2  b5  f7  23  00  64  64  64  d2  b4  07  23  10  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  17  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  16  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  15  64  d2  b4  17  23  c0  d0  00  00
SerialRead expected 256 bytes, received 150 bytes
64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  14  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  13  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  12  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  d7  23  64  d2  95  e8  23  64  d2  96  32  23  64  64  d2  b4  07  23  11  64  d2  b4  17  23  c0  d0  00  00  64  d2  bf  64  64  d2  b5  d7  23  01  64  d2  b5  e7  23  00  64  d2  b5  f7  23  00  64  64  64  d2