Dust removal software is incompatible with silver based monochrome film (works on the dye based film). As I understand it, the software uses the infrared channel and is confused by reflections from the silver grains, causing solarisation.
Only solution that I know is scan without the dust removal software followed by a session of tedious spot dust removal in your photo editing software, although this
has an interesting alternative if you are using photo editing software with history controls. If anybody has a quick solution, I would be grateful as I have large number of scanned monochrome images awaiting post scanning processing.