rewrite_calling_station_id not working

[Alan DeKok]

aaronrus at comcast.net wrote:
> I'm using ubuntu 10.4, FreeRADIUS Version 2.1.8

  Upgrade.

> I noticed this WARNING: Unknown module "tolower" in string expansion "%"
> in the rejected log.
> I have searched for a tolower program but can not find one to install.
>
> What package is tolower part of ?

  A recent version of the server.

> What am I missing?

  Upgrade.

  Alan DeKok.