I'm having a portamento problem with GPO4 and Finale 2011.
If I understand the procedure correctly, you have to have the sustain pedal down on both notes, then turn the cc#20 Portamento (to a high number, say 64, since I'm using it on a smaller interval) on the second note.
I've tried creating expressions to do this; I've tried using the midi tool directly changing the continuous data. The only thing that happens is the first note is sustained while the second note plays. No portamento.
I'm using the Violin Solo 1 KS in GPO4.
Sorry to bring up portamento yet again, but I've found no answer to this problem anywhere.