[Users] Action within filter not working

[sylpheed at 911networks.com]

CM 3.15

I have a filter:

execute "grep \"^Subject:\\ \" %f >> server-2017.txt" move "#mh/Mailbox/work/server"

* The move works
* The execute doesn't work

I created an identical action:

grep "^Subject:\ " %f >> server-2017.txt

and it works.

What am I doing wrong?

-- 
sknahT

vyS