I have installed all the latest updates (including the mentioned Kontakt 5.4.3) and the first tests seem promising - could not get it to crash with several instances of K5, doing all the things that were dangerous before ... fingers crossed that it's fixed - long term performance will tell ...

Yes, I have 5.4.3.307 and in fact that update was when I started having issues...go figure! Still 'fix' pending...didn't need fixing in the first instance!

Hi Fabio,
 
I downloaded (possibly) all updates to K5 in the past 2 years and kept the installers to be able to roll back in case the situation gets worse - so in case you can't rollback, PM me and I go dig out these installers from my backups and make them available to you ...
 
Anyway, none of them made any difference in terms of that particular stability issue, and I need to give the latest one a few more hours of testing to see whether NI really addressed my problem ... but I'm on an Octa-Capture, so it's a (somewhat) different animal ...
 
Rob

The suspense is KILLING me.  I am hoping the NI update fixed your issue - if it is indeed interface-specific then that would make sense as to why a bunch of others were not experiencing the same sorts of problems.
 
I HOPE this took care of that set of problems for you, and I will keep an eye out for any updates from you on where things stand now.
 
Bob Bone
 

FreeFlyBertl
Hi Fabio,
 
I downloaded (possibly) all updates to K5 in the past 2 years and kept the installers to be able to roll back in case the situation gets worse - so in case you can't rollback, PM me and I go dig out these installers from my backups and make them available to you ...
 
Anyway, none of them made any difference in terms of that particular stability issue, and I need to give the latest one a few more hours of testing to see whether NI really addressed my problem ... but I'm on an Octa-Capture, so it's a (somewhat) different animal ...
 
Rob

This (quad capture) update never worked for me. However, NI say it's a known issue with the octa capture and are addressing it in an update. (KT5-2120)

FreeFlyBertl
Hi Fabio,
 
I downloaded (possibly) all updates to K5 in the past 2 years and kept the installers to be able to roll back in case the situation gets worse - so in case you can't rollback, PM me and I go dig out these installers from my backups and make them available to you ...
 
Anyway, none of them made any difference in terms of that particular stability issue, and I need to give the latest one a few more hours of testing to see whether NI really addressed my problem ... but I'm on an Octa-Capture, so it's a (somewhat) different animal ...
 
Rob

Thanks a lot Rob for offering to do this. It's a kind of a risk at this point between taking a punt on rolling back and waiting for a possible fix. Most of the crashes I was experiencing with both Plt and X3 have stopped since not using Kontact in my projects - don't know about Melodyne in Plt yet and I haven't wanted to try it. This is a bit of bugger as well because I really liked Alicia's Key and have just recently purchased it...not to mention the Session Horns.
 
So I think I'll just hang out for a while longer and hope NI come up with an effective solution here as I can't be absolutely certain that a roll-back will work - and conversely whether the up-and-coming 'fix' will as well...I suppose I can always hope.