Yes. I did. See below the commands I tried.
root@:RE:0% set preprovisioned
root@:RE:0% set virtual-chassis member 1 serial-number BM0211335826 role line-card
set: Syntax Error.
root@:RE:0% set member 1 serial-number BM0211335826 role line-card
set: Variable name must begin with a letter.