I've created new game for ABBUC SW Contest 2006. Music is in RMT format, RMT file is atari object file (it has header and contains several data blocks). It should be linked this way:

    opt h-
    ins 'msx.rmt'
    opt h+

I've never used "h" option before, so I consult this problem with Raster (RMT programmer) - he used it in RMT sample codes.
It works in xasm 2.5.2... but version 3.0.0 simply ignores "h" option.