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My system is windows 7 64 bit, Avisynth+ 3.6.0 is installed.

Displayed when loading 64-bit dll:

Cannot load a 64 bit DLL in 32 bit Avisynth: 'D:/Program Files/AviSynthPlus/plugins64+/avss.dll'

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2 Answers 2

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You want to run 64bit plugins in a 32bit application - that's what the error, you got, tells us. You should install or build the 64bit version of avisynth as this should be able to work with the plugins.

Also Windows 7 is unsupported by Microsoft. The longer you wait with upgrading to Windows 10 (or using another modern OS) the more problems you will face.

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  • I installed 32-bit and 64-bit avisynth (AviSynthPlus_3.6.0_20200520_vcredist), this is not wrong. Why is it displayed 32 bit Commented Jun 14, 2020 at 6:04
  • You have a path D:\Program Files\ where the 64bit version should be but do you also have D:\Program Files (x86)\ where the 32 bit version is? Maybe sth. during installation went wrong and they both installed in the same location? Commented Jun 14, 2020 at 9:54
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Your path D:/Program Files/AviSynthPlus/plugins64+/ is by AviSynth recognized as an autoload path for 32-bit plugins, because this path is set (as a value) in an inappropriate registry key.

Launch Registry Editor and check / change path values in these keys:

  • HKEY_CURRENT_USER\SOFTWARE\Avisynth\PluginDir+ for 64-bit version,
  • HKEY_CURRENT_USER\SOFTWARE\Wow6432Node\Avisynth\PluginDir+ for 32-bit version.

or (lower priority)

  • HKEY_LOCAL_MACHINE\SOFTWARE\Avisynth\PluginDir+ for 64-bit version,
  • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Avisynth\PluginDir+ for 32-bit version.
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  • But the version according to OP is 3.6.0 which is the release from May 2020. Your link points to sth. way older. Have you mixed up things? Commented Jun 13, 2020 at 18:30
  • You're right, thanks. Version which I meant was then bumped to 3.4.0 and continues with this form of version numbering. Commented Jun 13, 2020 at 19:44
  • The problem now is that 64-bit avisynth does not work. Commented Jun 14, 2020 at 6:20
  • Please specify in details what does it mean “does not work”. Commented Jun 14, 2020 at 19:22

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