31.03.2022, 22:27
Problem solved.
After having installed the last version I have to install over the file "VapoursynthR57_torch_2022.03.31.7z"
Regarding the problem of DLL already loaded. I noted that in the error message there is the path of DLL loaded
So it seems that the new version of Vapoursynth R57 has gotten dumber or smarter (it depends on point of view) and now is able to find DLLs which are not included in the O.S. PATH. I really don't understand why the R57 was able to find the DLL "D:\Programs\VapourSynth64Portable\VapourSynth64\vapoursynth64\plugins\KNLMeansCL.dll" which is stored on a different directory level respect to Hybrid Vapoursynth which is stored in "D:\Programs\Hybrid\64bit\Vapoursynth".
I moved the portable version elsewhere and now is not more loaded and Hybrid is working as expected, but this behaviour is very dangerous.
After having installed the last version I have to install over the file "VapoursynthR57_torch_2022.03.31.7z"
Regarding the problem of DLL already loaded. I noted that in the error message there is the path of DLL loaded
vapoursynth.Error: Plugin D:/Programs/Hybrid/64bit/vsfilters/DenoiseFilter/KNLMeansCL/KNLMeansCL.dll already loaded (com.Khanattila.KNLMeansCL) from D:/Programs/VapourSynth64Portable/VapourSynth64/vapoursynth64/plugins/KNLMeansCL.dllSo it seems that the new version of Vapoursynth R57 has gotten dumber or smarter (it depends on point of view) and now is able to find DLLs which are not included in the O.S. PATH. I really don't understand why the R57 was able to find the DLL "D:\Programs\VapourSynth64Portable\VapourSynth64\vapoursynth64\plugins\KNLMeansCL.dll" which is stored on a different directory level respect to Hybrid Vapoursynth which is stored in "D:\Programs\Hybrid\64bit\Vapoursynth".
I moved the portable version elsewhere and now is not more loaded and Hybrid is working as expected, but this behaviour is very dangerous.