@Gubik said:

I've noticed that the hanging notes mostly takes place during playback in cycle mode and within identical MIDI channels from differnet MIDI port. For example if I playback a musicial phrase using MIDI Port 2/Midi channel 1, an unwanted hanging notes appears randomly at MIDI Port 1/Midi channel 1. This might suggest that the "Micro" used to identify the "Port" might not functional properly in Logic Pro.

Very interesting. This is the likely cause of my hanging notes too, as each string instrument has its own port, e..g  ch1 solo violin, ch2 violin chamber strings, ch3 violin sord chamber strings etc etc. This makes it very likely that most parts share the same midi channel. For me it happens just as much when not in cycle mode.

I am still using VE Pro 4.1.8008, each 'port' is in a separate instance, but you seem to be using VE PRo 5's new multi port facility? What's a "Micro"?

Another side effect of what you're describing is a problem with Mackie Control Universal. The MCU doesn't recognise separate tracks with the same midi channel, even if they are cabled to different VE Pro instances. This results in a weird duplication of fader channels on the MCU. My workaround is to always send to some unused MidiOverLan ports at the same time, ie sending midi into blank space, just so that the MCU can distinguish between tracks.

Dom

Did you try using IAC  ?

Did you look how much memory is left in Activity monitor ?

This has solved my hanging notes problem

I have this issue often with Morphestra.  I definitely think certain libraries are problematic with this.  All notes off does not kill it, you have to hit panic in Kontakt.