HP 4P scanner use

[Alan Duval]

Thanks to Brian McKee for advice to enable me to start XSane from my 
desktop instead of from root in a terminal. He advised to add my user 
name to the scanner group. I had to do this via root in a terminal.
However I have the annoying problem that an error message "Failed to 
create file: Permission denied" occurs when I try to close XSane. I have 
to close this error message 3 times before XSane closes.
I started XSane from a user terminal but the same error message occurred 
when closing and no message  occurred in the terminal.

When I typed users-admin in root this message occurred prior to the 
user-admin window opening:
** (users-admin:6683): CRITICAL **: Cannot create session bus: Did not 
receive a reply. Possible causes include: the remote application did not 
send a reply, the message bus security policy blocked the reply, the 
reply timeout expired, or the network connection was broken.
[WARN  6683] kit-hash.c:206:kit_hash_insert(): key != NULL
Not built with -rdynamic so unable to print a backtrace
root at mybox:/home/alan#

Could that have something to do with the XSane closing error?

Alan