Notification missing information

I have edited the "Client with warning" because I wanted to add information about what kind of warning the ERAS has detected. Per default it just sends a mail with a client list and the administrator will have to open the console to see what's wrong so I added a:

Message: %LOG_TEXT_TRUNCATED%

I was hoping that it would return some information but the message it sends contains the exact text "Message: %LOG_TEXT_TRUNCATED%" and the %LOG_TEXT_TRUNCATED% variable doesn't resolve to anything.

Is this an error or is there another way I can use to include the information I want?