brundlefly
Which Roland keyboard. Is the pedal on/off only, or continuous? Some synths respond incorrectly to All Notes Off that some old Roland keyboards (like my RD-300s) send on last key up, letting it override sustain. Actually, TruePianos has this issue. I don't usually use Rapture for pianos, but I just tried several in Rapture Pro, and they responded correctly to sustain from the RD-300s, so I'm not sure what the problem might be in your case, but I don't think it's a defect in Rapture Pro. I checked with continuous pedal from my RD-700NX, and that worked fine as well.
"Is the pedal on/off only, or continuous?"
Both. There are switch that i can choose witch one.
My sustain pedal is Roland DP-10.
I have tried my Roland BK-5 and M-Audio keyboard with that pedal. In either, Rapture Pro don't responding sustain pedal. I just don't know what i'm doing wrong.
With TruePianos it work's great and with everyone else. Only Rapture Pro, nothing happens.