Stacking Columns in Script

[#1]

I have a couple of questions about stacking data columns in a script. When I do it manually, I get the following script from JMP:

Data Table( "Untitled 11" ) << Stack(
columns(
:Name( "EFL 20508-17DT_CG_100ms" ),
:Name( "FFL 20508-17DT_CG_100ms" ),
:Name( "EFL 20508-18DT_CG_100ms" ),
:Name( "FFL 20508-18DT_CG_100ms" ),
:Name( "EFL 20508-19DT_NOCG_2" ),
:Name( "FFL 20508-19DT_NOCG_2" )
),
Source Label Column( "Label" ),
Stacked Data Column( "Data" ),
Number of Series( 2 )
)

In my script, I have a list variable (MyList1) containing the column names, and I would like to stack those columns using "Multiple Series Stack" to create a new table. Also, for "Number of Series" I would like to include NItems(MyList2). Can someone help me with the syntax?

I think this should work:

StackDT = SplitDT << Stack( Columns( MyList1 ),
Source Label Column( "Source" ),
Stacked Data Column( "Data" ),
Number of Series( NItems( MyList2 ) )
)
);

but it gives me "Column not found in access or evaluation of 'Bad Argument' " in the log.

[#2]

please note that in JMP9 if you fail to generate correctly the list it will crash totally

for example this wil do:

listaNDD = {"5932_NDD","6038_NDD"};

def5932_NDD = {"chips","bubbles"};

def6038_NDD = {"big on top","small on top"};

for(i=1, i<(NItems(listaNDD)+1), i++,

    a=listaNDD;

    c=Concat(a,"_stacked");

    d=Concat("def",a);

    Open( Concat(a,".jmp"), invisible );

    Open( b, invisible );

Data Table( a ) << Stack(

    columns((d)),

    Source Label Column( "class" ),

    Stacked Data Column( "density" ),

    Name( "Non-stacked columns" )(Keep(    :Split,    :Lot ID, :WID)),

    Output Table( c )

    );

);

because d it's not the list but a variable containing the name of the list ...