P: SDK width_in_chars MacOS accept String value

function ConfigDialogs.CameraFilm(f, propertyTable)
return
    f:group_box {
        title   = 'Adding Camera and Film',
        fill_horizontal = 1,    
        --------- Camera --------
        f:row { 
            f:static_text {
                title           = "Camera Name:",
                alignment       = "left",
                 
            }, 
            f:edit_field {
                alignment       = "left", 
                width_in_chars  = 20, 
                immediate = true, 
                value           = bind "CameraName",        
            },….   

width_in_chars = "11",

This works on MacOSX (and it should not) and fails on Windows (correct)