quick question - wildcard multiple logs in client-local?

I have a set of ever-changing-name log files which I want to check for the
string "ERROR"

This works in client-local.cfg, for file metadata:
file:`ls /vg8_bo3_stats/vg8_stats/top_talkers/server_*/server*`

This does not work
log:`ls /vg8_bo3_stats/vg8_stats/top_talkers/server_*/server*`

Should it? Or do I have to write a custom script? The files will be named
with the date like so
/vg8_bo3_stats/vg8_stats/top_talkers/server_4/server_4_2014-09-24T012005

xymon 4.3.17 on RHEL6

thanks Betsy