Error loading Python DLL on Windows 7

[bitcoin-core]

Error loading Python DLL on Windows 7

[achow101]

It should work on Win7 but I didn't test it (I don't have a Win7 machine).

Is it a 32-bit install? HWI currently doesn't support 32-bit OSes (I can make 32-bit builds if necessary).

[Kortik7]

Hi, it was me that @lontivero posted earlier. I tired installing this visual studio but still same error - python36.dll missing.

I have win7 Ultimate 64bit

also tried to install Visual C++ Redistributable for Visual Studio 2015 but win7 says that I have better version already installed
https://www.microsoft.com/en-US/download/details.aspx?id=48145

[nopara73]

Wasabi doesn't support 32 bit machines, so it will never be necessary for us.

[Kortik7]

Wasabi doesn't support 32 bit machines, so it will never be necessary for us.

I have win 7 Ultimate 64bit version.

[achow101]

I got a Windows 7 VM running and was able to reproduce this error. I'm currently investigating the cause and possible solutions. I think it may be related to the caveat mentioned here: https://pyinstaller.readthedocs.io/en/stable/usage.html#windows.

I'm trying to see if packaging the C++ Runtime DLLs with the binary will make it work.

[lontivero]

I also think it is because C++ runtime and that was the first thing @Kortik7 tried. He also tried installing the Windows x86-64 embeddable zip file. Btw, he also tried installing the Windows Software Development Kit (SDK) for Windows 10 as you can see in the screenshot. Finally I tried building the Windows binary with an older version of python but it only works for python >= 3.6.

But I didn't have a Win7 neither so, I still believe that one of this three things should have to work.

[achow101]

I did a build using Windows 7 and the resulting binary did work. Inspecting it showed that it included a bunch of DLLs which can be found in the Windows SDK for Windows 10. I'll see if including those in the binary with the wine build method will work.

[Kortik7]

I did a build using Windows 7 and the resulting binary did work. Inspecting it showed that it included a bunch of DLLs which can be found in the Windows SDK for Windows 10. I'll see if including those in the binary with the wine build method will work.

I just installed https://developer.microsoft.com/en-us/windows/downloads/windows-10-sdk mine was outdated but I still get the same missing python36.dll file.

[achow101]

@Kortik7 Can you try the hwi.exe file at https://github.com/achow101/hardware-wallet-interface/releases/tag/win7-fix

[nopara73]

@achow101 I got to my old Windows 7 and to this issue. Hopefully I will be able to work on this issue tomorrow.

I can reproduce the issue. I can confirm that your fix does not solve it.

[achow101]

@Kortik7 @nopara73 I believe I've fixed the issue and uploaded a new binary at https://github.com/achow101/hardware-wallet-interface/releases/tag/win7-fix. Can you try try that?

[Kortik7]

@Kortik7 @nopara73 I believe I've fixed the issue and uploaded a new binary at https://github.com/achow101/hardware-wallet-interface/releases/tag/win7-fix. Can you try try that?

I tried your method. and it fixed enumeration but I think there is a wasbi bug ledger Nano S still does not recognize.

[nopara73]

It's fixed. @Kortik7 no worry. We just check the hash of the software when start Wasabi and if not the same then reinstall hwi. So Wasabi still uses the same old one.

[Kortik7]

@nopara73 I was able to connect but my ledger shows zero balance. But I have balance on it.

my ledger does not use bech32. my balance in segwit with 3 in front.

[nopara73]

Now you're Ledger does: )