setaclmailbox not working. Always says " Invalid mailbox name".

[email protected]
Newsgroups gmane.mail.imap.cyrus
Message-ID <[email protected]>
Hi - On a brand new installation of Ubuntu 22, I installed cyrus-imapd, and cyradm.  I copied over the mailboxes rm an old Redhat 7 server.   Everything seems to work, until I try to use setaclmailbox to change permissions before deleting a mailbox.

Ioesn't work.  it claims all the parameters after the mailbox are part of the mailbox name.  Any idea why this is happening?   Thanks. - Mark 

127.0.0.1> lm user.testnonpriv.Trash
user.testnonpriv.Trash (\HasNoChildren) 
127.0.0.1> sam user.testnonpriv.Trash cyrus c
setaclmailbox: cyrus: c: Invalid mailbox name
127.0.0.1> sam "user.testnonpriv.Trash" "cyrus" "c"
setaclmailbox: cyrus: c: Invalid mailbox name
127.0.0.1> sam user.testnonpriv.Trash
usage: setaclmailbox mailbox id rights [id rights ...]

127.0.0.1> version
name       : Cyrus IMAPD
version    : 3.4.3-dirty-Debian-3.4.3-3build2


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