problems with iU819a-XL and Qundis 5.5R

[s-rnk]

hi everyone,

i have no success to get some data out of my qundis 5.5r heat meter. i got a raspberry pi 4 and a iU819a-XL an port /dev/ttyACM0, cloned the repository yesterday.
Its no problem to retrive some generell data from the meters with the python example from the manufacter of the dongle. but i got no sucess when i started:

wmbusmeters --debug auto:c1:

No meters configured. Printing id:s of all telegrams heard!
(serial) waiting for stop
(serial) received binary "C00924A6"
(iu891a) partial frame, expecting more. "C00924A6"
(serial) received binary "D1A06705B4414493447190796746370F"
(iu891a) partial frame, expecting more. "C00924A6D1A06705B4414493447190796746370F"
(serial) received binary "C7C0"
(iu891a) Unhandled wmbus gateway message 36

save with: wmbusmeters --debug auto:t1

No meters configured. Printing id:s of all telegrams heard!
(serial) waiting for stop
(serial) received binary "C00924A7"
(iu891a) partial frame, expecting more. "C00924A7"
(serial) received binary "07A96705BA414493443390796746370225C0"
(iu891a) Unhandled wmbus gateway message 36
(serial) received binary "C00924F6"
(iu891a) partial frame, expecting more. "C00924F6"
(serial) received binary "07A96705B441449344719079674637C2"
(iu891a) partial frame, expecting more. "C00924F607A96705B441449344719079674637C2"
(serial) received binary "DFC0"
(iu891a) Unhandled wmbus gateway message 36

config is standard:
device=auto:t1 or device=auto:c1

is it important to activate/deactivate the scan mode with the python script from the manufacter? had anyone problems like this before?

thanks for help!