unlang & expr

[petr.linke at seznam.cz]

Hi,
I need do some arithmetic operation in the soh-server, so I tried use the 
expr module.

example:
server soh-server {
...
    update control {
         &Tmp-Integer-1 := %{expr: 1 + 2 + 3}
    }

But from syntax checker I received error message: "Syntax error: Expected 
comma after '%{expr:': 1 + 2 + 3}"

Is possible use expr in this case?

Petr Linke