Error in loading the Plugin "UnrealEnginePython" because the module "UnderalEnginePython"could not be found.

[GustavoPeredo]

Every time I open the Unreal Engine this error message appear and I still want to use the plugin.
Im using the UnrealEnginePython_20170808_4_17_python27_win64.zip version.
I've python 27 Insalled.
HELP! PLEASE!

[rdeioris]

Hi, ensure you have 64bit python2 version and that it is in the system PATH. Eventually try and embedded version with python3

[ayy1337]

Hi I'm actually getting this problem as well, on linux..

[SysOverdrive]

I also encounter a simillar problem on win64 with the embedded version 3.6.

My error is as such : Could not find definition for module 'UnrealEnginePython' (referenced via default plugins -> UnrealEnginePython.uplugin)

[rdeioris]

@SysOverdrive is this an official editor distribution or a custom compiled one ?

[SysOverdrive]

Hi @rdeioris

it was the UnrealEnginePython_20180907_4_20_python36_embedded_win64.zip from the releases pages available in the instructions.

[idkw]

Same issue with on Windows :
UnrealEnginePython_20180907_4_20_python37_win64

C:\Users\idkw>python -V -V
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:06:47) [MSC v.1914 32 bit (Intel)]

With the embedded version, the engine manages to start but the plugin doesn't show up in the plugins list.

[rdeioris]

You are using a 32bit python :)

[idkw]

Great, works now with Python 64 bit installed, thank you

[akkerd]

Any news from the ones who where using the embedded version for 3.6?

I tried with both UnrealEnginePython_20181128_4_21_python36_embedded_win64 and UnrealEnginePython_20181128_4_21_python37_win64.

Both give me the same error when compiling from both the editor and VS:

Using Visual Studio 2017 14.16.27023 toolchain (D:\Programs\VisualStuidoBuildTools\VC\Tools\MSVC\14.16.27023) and Windows 10.0.17763.0 SDK (C:\Program Files (x86)\Windows Kits\10).
  
ERROR: Could not find definition for module 'UnrealEnginePython' (referenced via default plugins -> UnrealEnginePython.uplugin)

[akkerd]

Okay, after struggling to find a solution for 2 days, I tried compiling from the source and it worked. I am using python 3.7 installed on my machine and UE4 version 4.21.

If someone is having the same issues, try following the steps described here:
Installation from sources on Windows (64 bit)

And always compile from VS with UE4 editor closed for the first time!

[RonYanDaik]

Got same problem. Turns out that there is predefined list of path where compiler looks for python.

private string[] windowsKnownPaths =
{
// "C:/Program Files/Python37",
"C:/Program Files/Python36",
"C:/Program Files/Python35",
"C:/Python27",
"C:/IntelPython35"
};

Its in the Plugins/UnrealEnginePython/Source/UnrealEnginePython/UnrealEnginePython.Build.cs

Add there your path to python. For some reason its not mentioned in the How-to-install tutorial. I guess it happens sometimes.

[iamchriswick]

Python37 autyomaticly installs to "C:/Users/chris/AppData/Local/Programs/Python/Python37", so added this to the file mention above but I still get the error...