Ok, I gt the latest Kontakt 5.3.0 for OSX and I also have a Windows 7 boot on my machine. I've gone into the Windows boot and used this tool (http://audioz.se/audio-software/win/57426-download_lib-dropper-for-ni-kontakt-v10a-custom-tool-pre-version.html to create .nicnt files for all my libraries. I use the aa0, aa1, aa2 etc for SPNID so they all definitely have unique identifiers.

When I add one library, it adds fine. However, when I try to add a second library it does not load it and instead the first library shows up an error box asking me to locate the library or remove.

I've opened up the .nicnt files using TextEdit and can confirm that they are indeed different with unique SPNID identifiers.

Any ideas???

I've attached a couple of nicnt files as examples in case there is something obvious wrong with them.

 

are you putting wallpaper in the beginning for example ( wallpaper.nicnt )

 

Nope. Have a separate wallpaper.png file. My libraries contain, as an example:

Documentation
Instruments
Samples
wallpaper.png
LibraryName.nicnt

 

av0
au9

There's your problem. The format is a-f 0-9

 

Fab! Just tested it with trying to load the first few and they seem to work so that seems to be the problem. Re-edit all my nicnt it is then!