[Samba] smbcacls question

[Jeff Yana]

I am trying to run the following command and keep getting the same 
error. My question is is there a problem with my command or is this 
possibly an issue with Samba

smbcacls -d test_file -A ACL:DOMAIN\username:ALLOWED/0/CHANGE -U username

Here is the error:

debug_parse_params: unrecognized debug class name or format [test_file]
ERROR: Unable to open credentials file!

Any suggestions are welcome.

Thanks.

Jeff