[Dovecot] dsync problem

[Frank Bonnet]

hello

I try to convert from mbox to mdbox using dsync
i get the followin error using the following command

dsync mirror -u toto mbox:/user/toto:INBOX=/var/mail/toto

I get this error message :

mail3# dsync mirror -u toto mbox:/user/toto:INBOX=/var/mail/toto
dsync(root): Fatal: execvp(-u) failed: No such file or directory
dsync-local(root): Error: read() from worker server failed: EOF


any infos welcome
thanks