External FX work in N 14, but not in N 15

Currently all External FX connections work as inserts in Nuendo 14 and have done so for many months. New installation of Nuendo 15 is working with audio routing so far but External FX can not be turned on, changed or deleted.

I have tried renaming the External Plugins.xml file to create a new External FX.xml file and no change. Also tried removing and adding external FX in the Audio conections panel does not result in a workable or accesable External FX inserts. All other insert types seem fine.

Could be something simple, but I’m at a loss and suffering more lost time on an “upgrade”

Works fine here in N14 and N15 on win-11, but this does not solve your problem!

Thanks, whatever it is it is is it seems to be randomly impacting pluggins and shutdown process.

Solved, as I suspected something stupidly simple and easily solved. Delay compensation accidently left on after a resource check. All good now and back to work.