This is to let you know that the solution also worked for me. Just a few hints which might be helpful for others:
(1) I had to remove the substring "REMOTE_" in the variable names as intruced by yotom. Otherwise I still got the error message which he was mentioning.
(2) For some reasons, in my installation, irexec was looking to /etc/lirc/lirc/lircrc instead of /etc/lirc/lircrc. I just copied the lircrc into a newly created subdirectory (I first missed that but I came across a helpful error message when I run irexec manually
)
(3) Last but not least: irexec has to run while using vompclient. I put "irexec -d" into the rc.local. I could imagine that the configuration should have done that for me. But in my case, it did not.
Much better than at the beginning: even the color buttons work. Also, when pressing a key constantly, there is auto repeat now.
MANY THANKS
(1) I had to remove the substring "REMOTE_" in the variable names as intruced by yotom. Otherwise I still got the error message which he was mentioning.
(2) For some reasons, in my installation, irexec was looking to /etc/lirc/lirc/lircrc instead of /etc/lirc/lircrc. I just copied the lircrc into a newly created subdirectory (I first missed that but I came across a helpful error message when I run irexec manually

(3) Last but not least: irexec has to run while using vompclient. I put "irexec -d" into the rc.local. I could imagine that the configuration should have done that for me. But in my case, it did not.
Much better than at the beginning: even the color buttons work. Also, when pressing a key constantly, there is auto repeat now.
MANY THANKS