Problem running tcl/tk

[Pavel Fedin]

 Hello!

 I experience problem running tcl/tk applications. Attempt to do so results
in:
--- cut ---
$ wish /usr/lib/tk8.5/demos/timer
assertion "font != NULL" failed: file
"/usr/src/ports/fontconfig/fontconfig-2.11.1-1.x86_64/src/fontconfig-2.11.1/
src/fcmatch.c", line 453, function: FcFontRenderPrepare
Aborted (core dumped)
--- cut ---

 What is wrong ? It looks like fontconfig cannot find fonts. Of course i
have X server installed, it is running, and i have executed 'export
DISPLAY=:0' before.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia