by garfy » Thu Oct 24, 2019 9:27 am
Hi paulsky
Few things to check:
Do AT3 and AT4 work properly as standalone?
In the Logic Plugin Manager, are they showing as passing AU validation?
Do they work properly in Logic as plugins?
Were the 'older' songs you're trying to open definitely created with either AT3 or AT4, rather than an older version? If it was AT1 or 2 then this could be why you are getting this response.
Let us know how you get on.
System Specs: 2012 Mac Mini 2.6 i7 & 2015 MBP 2.2 i7, 16GB RAM
macOS10.15.7 Logic 10.6.1 Reason 11
Various IK, NI, Waves, Softube, Eventide, XLN software
Focusrite 18i20 x 2, Novation ReMote 25SL