I made a simple IW2D app with Marmalade SDK, it worked fine in the Windows emulator but when I deployed to Android I received this exception:

cannot open file iwui_style/style.group.bin for serialising (read), Did you include this file in your mkb assets block

The solution was  to add this block to my MKB file

assets
{
    (data-ram/data-gles1)
    ui.group.bin
    (data-ram/data-gles1)
    iwui_style/style.group.bin
}