Yamaha DTXpress/DTXplorer/DTXtreme

I had the same problem but I don't know its meaning. I change of software
and now it works. I use Dumpster(I tried Dtxchange and an alesis software
before).
Maybe some files may not work, I don't why but if you save and reload all
your files with Dumpster there will be no error.(I don't have errors yet).