Howdy, I've been reading on this forum for quite some time now and have always been able to find an answer to my questions until now. I found three other instances where this question was asked but it seemed to be ignored. I am attempting to use the ME7EEPROM tool to delete an immobilizer, but it always stops at error=0x21007 or error=0x50001. There seems to be a random chance of either error code resulting since they will sometimes be thrown immediately after each other if the exact command is run. What might be causing this error? I'm using a dumb K-Line cable, have tried many a KKL cable, Galletto just for grins, genuine Ross-Tech, Ross-Tech clone, Chinese FTDI cable, and three other random cables I could find, yet this failure still haunts me. I've also tried different memory types, none of which resulted in a change.

I always had better luck with 1.31 and run the highest baud 50xxx because some cables dont seem to like the low bauds. Oh also its 95% likely it wont work in car obd.

Tried 1.3, but I couldn't get the baud rate to change with the -b function. Am I using it correctly? I tried placing it in different places, but I'm sure the first location was correct.

Do you have a software that works with it? Something like rosstech?  Even use a different module just to confirm everything  is wired correctly and you have no weird shit going on with your laptop/pc. 

Worth noting:

Sometimes I need to try like 20 times before it will finally work. Some ecu's seem to like 1.31 better but sometimes 1.4 does the trick for me. Great tool, except has quite some issues and sadly is not open source.

Hmmm the way the 5 bit baud initialization works is by doing a bunch of break state and  rts on off.  Because rs232 devices just don’t go that low for baudrate.  So it’s “tricked” if you like.  I say rs232, but I’ll table that discussion for another day.  All of the info can be found here.  https://www.blafusel.de/obd/obd2_kw1281.html
You would really need to look at what is happening with the signal on a scope and if you can see what’s going on it’s gonna be hard to modify without source code.  It’s possible it’s doing it too fast or too slow.  You can maybe try reducing the cores on your pc.   Use a usb 2.0 port instead of usb 3.0 that might help too.  I only say that because I’ve had issues with other devices in the past with a shitty usb supposed to be backwards compatible port.

Have you tried the freely available K+CAN VAG COMMANDER?  I just mentioned it as you have not listed it. I don't like it much, but you should investigate it to see if it is compatible with your car. It can do IMMO stuff on the motor ecu

This. OBDII mode is not worth your time.

me7eeprom.exe --bootmode (chip) --CSpin (Pin) -r  -p (your port) (name the file)

Done.