Message definition "any other character: update" not working?

[dietersiebs]

I defined my own csv files, now I have many entries and some of then I don't really need. But I want to use that entries in configuration only for refresh, not with actice polling. So I read in "Message definition"

"any other character: update
All of the remaining characters can be used to define a passive message that ebusd will listen to in order to recognize updates of field values. If the type is suffixed with a "w", the message is treated as write message as mentioned above. Otherwise it is treated as read message."

which I understand, that I should edit an entriy like this

r,,TariffAuxHeater,,,,,1000,,,UIN,, ,Secondary heater tariff value

to

u,,TariffAuxHeater,,,,,1000,,,UIN,, ,Secondary heater tariff value

and it will be only updated, if an suitable message appears on the bus.

But if I try this, I always get an error at the starting from ebusd, (ERR: missing argument, circuit). Reediting the file to r,..., it works fine.

Is this an wrong information in wiki, or did I make (or understood) it wrong?

Best regards
Dieter