/NTUPLE/MASK/FILE fname [ chopt ]

FNAME	C	File name
CHOPT	C	Options D='R'

CHOPT:

'R'	Existing file is opened (read mode only).
'N'	A new file is opened.
'U'	Existing file is opened to be modified.

Open a MASK file.

/NTUPLE/MASK/CLOSE mname

MNAME

C

Mask name

Close a MASK file.

/NTUPLE/MASK/LIST [ mname ]

MNAME

C

Mask name D='*'

List the MASK files currently open.

/NTUPLE/MASK/RESET mname ibit

MNAME	C	Mask name
IBIT	I	Number of bit to reset D=1 R=1:32

Reset on bit in a mask file.