Hi Steflor 
Can you explain me where did you get:
-“FCP_SMT_103_HAL_StraightNylonGuitar” and the rest of _HAL? (104,105,106)?
I suspect that this is the file that I don’t have, because a lot of labeled “nylon” presets don’t work in my Halion (missing files error).
I don’t have your “_PRESETS” (123, 124, 125, 126, 129, 130, 131), but I suppose that is because I didn’t buy the Absolute Collection and it’s synths… I also don’t have 121 nor 135, which I don’t know if they are important.
I had Halion 4.5.4 perfectly installed in my computer (updated from Halion Sonic), and at that time any preset failed. Now with this Halion 5 update, I get “missing files” with a lot of nylon guitars and harps… I suspect that people at Steinberg has added new presets for Halion 5, but hasn’t realized that the VSTSOUND files were’nt in Halion Sonic 1.5 or Halion 4.5.4, and only the people who buy the boxed product will make them sound 