bash-3.2$ # The below find works fine..
bash-3.2$ find . -type f -exec grep -il "search string" {} ;
bash-3.2$ # But I am unable to redirect output to a log file..
bash-3.2$ find . -type f -exec grep -il "search string" {}  > log.txt
find: incomplete statement
bash-3.2$

-exec command   True if the executed command returns a  zero
                value  as  exit  status.   The end of command
                must be punctuated by an  escaped  semicolon.
                A  command  argument  {}  is  replaced by the
                current path name.

find . -type f -exec grep -il "search string" {} ; > log.txt