Beckhoff Problem with Communication (TwinCAT, LinuxCNC)

Hey Guys,some of you know so much about this Topic so I hope I can find someone in the mood to help me.Im trying to make a CNC 3-Axis on Raspberry PI5 and Beckhoff, the problem is that im completly new in this topic and try to learn as much as possible but i got already stuck in the beginning. EtherCAT works fine and i got the "Koppler" and Cards but if im trying to get them into LinuxCNC like some videos teach the Programm wont start anymore

If i start i get the message: Failed to register PDO entry: No such file or directory
LCEC: master 0 PDO enty registration failed

A friend and myself checked the code 10x, and it seems that the problem starts before. I cant get the EK1100 connected to TwinCat or CodeSYS, too. Whats kind of weird to me because as i said if I try it with the "ethercat slaves" command, it knows The Ek1100 and all Cards


Thanks for everybody who can help me with this and invests some of his time for me

Better like that?

seems like the lcec file in the hal fie has an invalid path. or XML has an invalid path.

Only way to know is to have the xml and hal files, the error messages and some lines around them, and the last say 30 lines of the syslog.

Ive already tried it on 3 different ways now,

1. A youtube Video from Talla82 (looked awsome how easy it would be....)
2. with the Instructions from you (Forum) @rodw
3. ChatGPT whats kind of ... depressing and for sure wont work

I can hang you the current lcec.conf whitch is the setup for my EK1100 hopefully you can help me correct it

What's that? Never seen that before.
Anyway that won't work with lcec_conf, it requires a file in xml format.

Easiest way, I think, is to take the output of the command "lcec_configgen" and put that
in the ethercat-conf.xml file and use that as input to lcec-conf.

Example here to show the structure and syntax of things
github.com/dbraun1981/hal-cia402/tree/main/example
Reference to lcec and lcec_conf
github.com/linuxcnc-ethercat/linuxcnc-ethercat
 

I didnt see that either, its what i got with my last and frustraded way by using AI.
Before I did the "Thing" above I had this as .xml but that didnt work, too

I have started by doing it exactly like this : 

Best if you show
the xml and hal files, the error messages and some lines around them, and the last say 30 lines of the syslog.