[xcrysden] Problem when plot 2D grid with color black_brown_white

[Xunlei Ding]

Dear All,

I have a problem. When I plot a 2D grid in a xsf file using xcrysden, 
with black_brown_white color basis, it gives an error as below.
When ploting 3D data , or using other color basis, there is no problem.
What's wrong I may make? Thank you!

wanted integer, but got "COLORBASE_MONO" while executing xc_iso isoplane 
0 COLORBASE_MONO 0
    while executing
"xc_iso isoplane 0 $basis $func $what "
    invoked from within
"if $upd {
    if { $isoControl(colorplane) && !$isoControl(isoline) } {
        set what "colorplane"
    } elseif { !$isoControl(colorplane) && $isoControl(is..."
    (procedure "UpdatePropertyPlane" line 52)
    invoked from within
"UpdatePropertyPlane"
    invoked from within
".iso2D.f3.sub invoke"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 [list $w invoke]"
    (procedure "tk::ButtonUp" line 22)
    invoked from within
"tk::ButtonUp .iso2D.f3.sub"
    (command bound to event)

Yours sincerely,
Ding