SAV -- What's wrong with this picture?

I had a problem yesterday when I was trying to do a save of IFS objects
with the SAV command and omit some folders that I didn't need.  I kept
getting the error "Parameters not valid with multiple file systems."  I
couldn't figure it out so I ended up saving more than I needed to.  Today
I'm experimenting with it on a different box but having the same results.

I want to see if I can save a folder called /DAPARNIN that has a subfolder
called Backup.  I'm still getting the "Parameters not valid with multiple
file systems." error.

The command I am using that doesn't work is:
SAV DEV('/QSYS.LIB/TAP01.DEVD') OBJ(('/DAPARNIN') ('/DAPARNIN/Backup'
*OMIT)) ENDOPT(*LEAVE) USEOPTBLK(*YES) UPDHST(*YES)

We use this in our nightly backup and it works:
SAV DEV('/QSYS.LIB/TAP01.DEVD') OBJ(('/*') ('/QSYS.LIB' *OMIT) ('/QDLS'
*OMIT)) ENDOPT(*LEAVE) USEOPTBLK(*YES) UPDHST(*YES)

What am I doing wrong?

Dave Parnin
Nishikawa Standard Company
Topeka, IN  46571
daparnin@xxxxxxxxxxxxxxxxxx