I found a thread that was from a little while back but nothing seemed to be addressed or a solution found. 
So I will post my request here to see if someone can shed some light on this issue.

Here is my situation and set up. I am running DP8 and VEPro5 on the same Mac system. I also have a VEPro server running on a satellite PC.

No matter how many instruments or kinds of instruments in kontakt5 I have playing at the time of  tempo change in DP, the audio pops, glitches, & drops out for a brief second.
For example in this one instance, I have VEPro loaded up with 15 instances housing KONTAKT5 with a total of about 26G of samples loaded in RAM, in which i have 64G of.
The only instruments/samples that are being played are a piano patch and a pad. As it plays back over a tempo change the glitch happens. 
I've tested bringing in the SAME Kontakt multi into a kontakt housed in DP and the glitch does not happen.
Mind you, the glitch also happens on all my orchestral samples on the satellite PC as well. 

seems the more I have loaded into VEPro the more severe the problem is.

by removing 1 instance in VEPro the problem seems to lessen, by removing 2 instances in VEPro the problem only happens every once and a while, but i can't be sure this has anything to do with it, as it still occurs when ever the hell it wants to.

Tried trashing preferences, didn't cure it.

ANY HELP on this is greatly appreciated.
Scoring films and tv it is nearly impossible to avoid using tempo changes. 
Knowing this is happening to other users especially using a DAW other than DP, goes to show that it is in fact VEPro's issue and NEEDS to be fixed. ASAP!

Many thanks in advance for any help that can be shared. 

Regards,
Kevin

Hey DG, Thanks for the response.  I assumed it wasn't Kontakt causing it because the glitch wouldn't happen when any Kontakt instance was loaded straight into DP.  I haven't tried testing the glitch out on anything other than NI instruments. (I do believe it happens to Massive & Zebra too) I'll have to double check that. 

re: Tempo Sync, yeah I need this on and I do use a quick tempo change, no ramps

The glitch actually does not happen when I 'freeze' the tracks to audio. That is currently my only possible work around. Inconvenient with how I create stems but for the time it it works. 

I'll go bark up NI's tree about this and also see if others have reported on this issue there. 

But i am still open for any input here if anyone wants to share.

Thanks again,

Kevin

Bumping this old thread. I still get glitches in VE Pro 6.0.17966. It happens with Kontakt and Spitfire BBC. It's especially noticable when you ramp the tempo change, like from 70 to 50 in two bars. I'm using Cubase 10 for Mac as my DAW, VE Pro Server on Windows 10. Has anyone ever found a fix for this? Disabling tempo in Kontakt helps a bit, but this isn't possible in the Spitfire player. 

I find raising the buffer in my DAW (DP) helps playback with those kind of glitches.

I have had in the past to print a mix up to the tempo change, and then the mix after, and then joining the two.

A "PIA", but hey, whatever works.

Sometimes it's plugins, not VE Pro, that are the problem.

And stuff like Omnisphere, if there is tempo-sync stuff, will glitch.

I still think that the problem is in the DAW, not Vienna Pro.

I've had this problem since day 1 on my VEP server. I've figured out some unorthodox workarounds, but they take time. In Omnisphere we have a similar problem, however it affects only parameters like delays, since changing the tempo modifies those delay times. But in the case of VEP this happens on any instrument, as dry as can be.