I've now resolved the issue of the hidden windows, so I'll mark this problem as having been solved when I post this.
Just for the record, the problem was caused by the data table having been minimized (which was something I'd done purely for cosmetic purposes) prior to the column selection dialog being invoked. If anyone runs into a similar problem in the future, the following short script may help to identify the cause. This would need to be compiled into an add-in, and then called from the main menu above the data table (not from the JMP Home Window) once the data table has been opened from the Windows Taskbar.
Names Default to Here(1);
fnSelectColumn = function({dt}, {default local},
new window("Column Selection", << modal(1),
clb = ColListBox(dt, all, Output = (clb << get selected), << set max selected(1))
);
Output
);
expr_Load_DT = expr(
dt = current data table();
if(type(dt)=="Empty",
dt = open(PickFile( "Select the JMP data set to be analyzed:",, {"JMP Data Files|JMP"} ));
)
);
/*
================
START OF PROGRAM
================
*/
Intro = "There's another full-screen Windows application open right now, and you've just loaded the data table you can see ";
Intro = Intro || "behind this window from the Windows Taskbar, prior to selecting a column for analysis.\!r\!rHowever, the ";
Intro = Intro || "modal window containing the column selection dialog will disappear behind the other Windows application if the ";
Intro = Intro || "data table is minimized prior to the column selection dialog being displayed. (If it hasn't, there's no problem.)";
MinimizeYN = 1;
new window("Minimize the Data Table?", << modal(1),
VListBox(
HCenterBox(BorderBox(TextBox(Intro, << padding(5)), << padding(10), << sides(15))),
SpacerBox(size(0, 10)),
rb = RadioBox({"Minimize the data table after closing this window", "Don't minimize the data table after closing this window"},
MinimizeYN = (2 - (rb << get))
)
)
);
expr_Load_DT;
dt << minimize window(MinimizeYN); // THIS line is the one that causes the problem;
Output = fnSelectColumn(dt);
Caption("(You selected \!"" || Output[1] || "\!")"); wait(1.5); caption(remove);
/*
================
END OF PROGRAM
================
*/