I must add some more weirdness, which leads me to believe its not the midi interface.
I have tested three different midi interface now, 1 midisport 4×4, one rolan um-one mk2 and one that is on my PCI soundcard. They all give same problems. However if i download a patch/.sig file from internet and do send. it always works?!?!
i can send huge patches with no problem at all?!
Could it be that the vsig editor dont work properly for dsp4000, perhaps i need an older version? i have also tested version 2.0 of vsig, same problem there.