encoding pragma aborts script

[RH]

Hi,
I have an app which connects via DBI:DBD:CSV to a flat file.
When I include pragma use encoding, the app aborts (message from OS and the
script is killed).
I found out that script is aborted during execute method of DBI.
The DB file has only ASCII characters. I use pragma encoding to display 
latin extended characters in Tk widget.
Does anyone know what's the cause?
Many thanks.
Radek H.