[Dovecot] dsync(root): Fatal: execvp() failed: No such file or directory

Hi everybody,

I try to convert mbox to maildir using local locations

/root/mail is a dir with mboxes /root/INBOX is mbox file

h=/root dsync -f -v mirror
mbox:$h/mail:INBOX=$h/INBOX
maildir:$h/Maildir:CONTROL=$h/dovecot:INDEX=$h/dovecot \

as result I have

dsync(root): Fatal: execvp(mbox:/root/mail:INBOX=/root/INBOX) failed: No such file or directory dsync-local(root): Error: read() from worker server failed: EOF

thank you for any help

FreeBSD, dovecot 2.0.15