Error using mex No supported compiler was found - Windows10 Matlab2019a

Hello,

I am trying to setup kilosort2 (a spike sorting package here: https://github.com/MouseLand/Kilosort2). It instructs me to set up mexcuda support. I am using Matlab2019a on Windows 10 and installed CUDA 10.1. I also installed Visual Studio Community 2019 and MinGW-64 compiler add-on. However, when I run the necessary script to setup kilosort2, I get this error:

Error using mex

No supported compiler was found. For options, visit https://www.mathworks.com/support/compilers.

This is the associated code:

mexcuda -largeArrayDims mexThSpkPC.cu

mexcuda -largeArrayDims mexGetSpikes2.cu

mexcuda -largeArrayDims mexMPnu8.cu

mexcuda -largeArrayDims mexSVDsmall2.cu

mexcuda -largeArrayDims mexWtW2.cu

mexcuda -largeArrayDims mexFilterPCs.cu

mexcuda -largeArrayDims mexClustering2.cu

mexcuda -largeArrayDims mexDistances2.cu

When I try mexsetup, I get this:

>> mex -setup C++

MEX configured to use 'MinGW64 Compiler with Windows 10 SDK or later (C++)' for C++ language compilation.

Warning: The MATLAB C and Fortran API has changed to support MATLAB

variables with more than 2^32-1 elements. You will be required

to update your code to utilize the new API.

You can find more information about this at:

https://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html.

To choose a different C++ compiler, select one from the following:

MinGW64 Compiler (C++) mex -setup:C:\MATLAB\R2019a\bin\win64\mexopts\mingw64_g++.xml C++

MinGW64 Compiler with Windows 10 SDK or later (C++) mex -setup:C:\Users\EMoore\AppData\Roaming\MathWorks\MATLAB\R2019a\mex_C++_win64.xml C++

Microsoft Visual C++ 2019 mex -setup:C:\MATLAB\R2019a\bin\win64\mexopts\msvcpp2019.xml C++

I've tried all the different C++ compilers listed at the end and get the same error if I re-run the mexcuda commands. I believe I'm using the correct versions, given the documentation online.

In case it helps, this is what I get when I look at gpuDevice:

gpuDevice

ans =

CUDADevice with properties:

Name: 'GeForce GTX 1060 6GB'

Index: 1

ComputeCapability: '6.1'

SupportsDouble: 1

DriverVersion: 10.1000

ToolkitVersion: 10

MaxThreadsPerBlock: 1024

MaxShmemPerBlock: 49152

MaxThreadBlockSize: [1024 1024 64]

MaxGridSize: [2.1475e+09 65535 65535]

SIMDWidth: 32

TotalMemory: 6.4425e+09

AvailableMemory: 5.2377e+09

MultiprocessorCount: 10

ClockRateKHz: 1708500

ComputeMode: 'Default'

GPUOverlapsTransfers: 1

KernelExecutionTimeout: 1

CanMapHostMemory: 1

DeviceSupported: 1

DeviceSelected: 1

I am very new to using compilers, so I may be missing something obvious when reading through the readme file and online instructions. Does anyone know what my problem might be or what I could try? Thanks,

[Walter Roberson]

Reading between the lines because I do not find explicit documentation at the moment, it looks like for windows for mexcuda you need to have VS 2017 or VS 2015 Professional

[Elisabeth Moore]

Thank you so much! It works now with VS 2017.