Import Pystan._api Failed:importerror: Dll Load Failed: The Specified Module Could Not Be Found

I have installed python 3.7 and want to do some forecasting using fbprophet (https://facebook.github.io/prophet/docs/installation.html#python) But I get this error when installing

Solution 1:

It says in the Pystan documentation that configuring a C++ compiler can be challenging on Windows. Following approach worked for me to install Pystan 2.17.1 and FBProphet 0.6:

1. Install C++ compiler, mingw-w64 (http://mingw-w64.org/doku.php/download) -> I selected this one https://sourceforge.net/projects/mingw-w64/files/

2. Add C:<MinGW_w64 installation directory>\bin to the PATH environment variable

3. Create a distutils.cfg file with the following contents in the folder \Lib\distutils in Python install directory (in venv):

   [build] compiler=mingw32

   [build_ext] compiler=mingw32

4. pip install numpy cython

5. pip install pystan==2.17.1

6. Verify the Pystan installation (https://pystan.readthedocs.io/en/latest/windows.html)

7. pip install fbprophet==0.6

Solution 2:

Follow https://github.com/facebook/prophet/issues/1939 I had similar issues even after installing Mingw

conda install libpython m2w64-toolchain -c msys2 Solved all the errors and i am able to install fbprophet finally Thanks

Solution 3:

I had similar issues with my Python3.6 (anaconda)

I reinstalled anaconda for all users (with admin privileges) then "conda install -c conda-forge pystan" later i updated all other modules

it works without any error now