Matlab 2019b, error "gpu.dll is not a valid Win32 application"

Hi,

Problem:

I have a weird problem with my Matlab 2019b installation (academia version).

I am trying to train a feedforward neural network, using my gpu, but Matlab keeps telling me that "gpu.dll is not a valid Win32 application.".

I can replicate that error when I try to read the gpu informations in Matlab:

>> count = gpuDeviceCount

count =

     1

>> gpu1 = gpuDevice(1)
Failed to load library: gpu.dll, error was: gpu.dll is not a valid Win32 application.

What I tried so far without success:

• installed the newest graphics driver
• reinstalled Matlab 2019b
• verification of windows files ( SFC /scannow )

My system:

Windows 10 home, Intel i5-7600K CPU, NVIDIA GeForce GTX 1060 6GB GPU

I also know that the GPU has CUDA support and I used it in the past with different software (not recently though).

Matlab info

MATLAB Version: 9.7.0.1261785 (R2019b) Update 3
MATLAB License Number: XXX
Operating System: Microsoft Windows 10 Home Version 10.0 (Build 18363)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.7         (R2019b)
Simulink                                              Version 10.0        (R2019b)
Aerospace Blockset                                    Version 4.2         (R2019b)
Aerospace Toolbox                                     Version 3.2         (R2019b)
Curve Fitting Toolbox                                 Version 3.5.10      (R2019b)
Database Toolbox                                      Version 9.2         (R2019b)
Deep Learning Toolbox                                 Version 13.0        (R2019b)
GPU Coder                                             Version 1.4         (R2019b)
Global Optimization Toolbox                           Version 4.2         (R2019b)
Image Processing Toolbox                              Version 11.0        (R2019b)
MATLAB Coder                                          Version 4.3         (R2019b)
MATLAB Compiler                                       Version 7.1         (R2019b)
MATLAB Compiler SDK                                   Version 6.7         (R2019b)
Optimization Toolbox                                  Version 8.4         (R2019b)
Parallel Computing Toolbox                            Version 7.1         (R2019b)
Predictive Maintenance Toolbox                        Version 2.1         (R2019b)
Signal Processing Toolbox                             Version 8.3         (R2019b)
Statistics and Machine Learning Toolbox               Version 11.6        (R2019b)
Symbolic Math Toolbox                                 Version 8.4         (R2019b)
System Identification Toolbox                         Version 9.11        (R2019b)
Wavelet Toolbox                                       Version 5.3         (R2019b)

I am not sure if that is a problem with Matlab, the graphics driver or windows.

Thank you.

Kind Regards

[Walter Roberson]

When did you last update the GPU driver?

[Alison Eele]

This could mean there is a corrupted file in your installation. Could you please contact our technical support and we'll be able to get you sorted.

[Stephan Koschel]

@Walter Roberson:

I updated the driver this morning, around 12h ago. The driver before was older and was installed when I bought the desktop (2 years). I didn't make a difference

@Alison Eele:

I tried reinstallation of Matlab, first installing it over the current installation and then removing the old one first and installing it completely new. Did not make a difference.

I will contact the technical staff tomorrow. I was hoping it is a common problem with an easy solution.