Problem with hourly.sh

Hello !
while triying to run hourly.sh I get an error with points to=20
"filter_audit.awk" line 28 -->  sub(/^.*\//, "", router);

-bash-3.00$ hourly.sh
awk: syntax error near line 29
awk: illegal statement near line 29

Could you help me on that ?
Thanks in advance

Lourdes