[Freeswitch-users] Create User xml file automatically (directory/default/called_no.xml)

Hi all, I need to do following in voicemail module of FS. when called number is not available, call is routed to voicemail. I did that using dial plan.But system error coming as "user not exist". When I create directory/default/called_no.xml file manually, it is not coming. I need to create that file automatically for each called number, which is not available. How to do that ? Br, Sanath