I have three machines with Komplete 13, an elderly Intel i5 desktop with Windows 10, an elderly i3 desktop with Windows 10 and a handle to make it 'transportable' and a Dell XPS 15 laptop with Windows 11. The i3 is now relegated to a standby for the Dell laptop.
The two Intel desktops have had several iterations of Komplete and have been upgraded from Windows 7 and a lot of legacy software. Both have worked very well with Reaper and Komplete. The Intel i3 and the Dell laptop continue to be fine, but the Intel i5 started an existing Reaper project with,
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Microsoft Visual C++ Runtime Library
Runtime Error!
Program C:\Program Files\REAPER (x64)\reaper.exe
This application has requested the Runtime to terminate in an unusual way.
Please contact the application's support team for more information.
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I checked with Native Access and all was reported up to date. I checked the plugin paths in Reaper, made sure the paths matched Native Access preferences and did a complete rescan. Kontakt VST and Kontakt and Kontakt 5 dlls loaded, but no other Komplete VST3s loaded and most came up with the c++ errpr. I re-installed via Native Access and nothing changed. I un-installed the old versions of Komplete (8 and 9?) and the failing individual components via Control Panel and installed and authorised them via Native Access. One or two earlier VSTs started working.
I thought this was a Reaper problem until I tried the stand-alone applications. Only Kontakt and Kontakt 5 worked.
<lots of research> I un-installed the Microsoft c++ redistributables down to Studio 13 and re-installed them and uninstalled the Komplete failing components and re-installed, once again, and some older stand-alones and dlls started to work. I uninstalled the Dirt plugin and checked that there were no Dirt VST3s or dlls left in C\:. I reinstalled Dirt and it failed to scan.
This is the current position:
Working Standalones: Reaktor 5, Battery 4, Absynth 5, Kontakt 5, Kontakt. Guitar Rig 5.
Non-working Standalones: Massive, Guitar Rig 6, Reaktor6 (with a small notification window containing a 'close' X in a red circle), FM 8,
Working VST3s: Kontakt (64 out)
Working VST2s: Absynth 5 VST, Absynth 5 (2-6ch) VST, FM8 VST, Guitar Rig 5 VST, Reaktor 5 VST, Reaktor 5 (2->8ch) VST, Reaktor 5 (6ch) VST, Reaktor 5 (16ch) VST, Absynth 5 VSTi, Absynth 5 (2-6ch) VSTi, Battery 4 (32 out) VSTi, FM8 VSTi, Kontakt (64 out) VSTi, Kontakt 5 (8 out) VSTi, Kontakt 5 (16 out) VSTi, Kontakt 5 (64 out) VSTi, Reaktor 5 (2->8ch) VSTi, Reaktor 5 (2->16ch) VSTi
(Note: some appear as VSTs and some as VSTis.)
VST3s that fail a scan with the c++ error: Bite VST3, Choral VST3, Dirt VST3, Driver VST3, Flair VST3, Freak VST3, Guitar Rig 6 VST3, Massive X VST3, Massive VST3, Phasis VST3, Raum VST3, Replika VST3, Solid Bus Comp VST3, Solid Dynamics VST3, Solid EQ VST3, Super 8 VST, Supercharger VST3, Transient Master VST3,
DLLs that scan, but are not added to the Reaper FX list: Bite DLL, Choral DLL, Dirt DLL, Driver DLL, Flair DLL, Freak DLL, Guitar Rig 6 DLL, Massive X DLL, Massive DLL, Phasis DLL, Raum DLL, Reaktor 6 FX DLL, Reaktor 6 DLL, Replika DLL, Solid Bus Comp DLL, Solid Dynamics DLL, Solid EQ DLL, Supercharger DLL, Transient Master DLL,
So, older Komplete apps seem to work, but those that came with K13 seem to fail.
Any ideas? Sorry to burden this list with it, but there does not seem to be any other way to kontakt NI support.