Error using parallel.g​pu.CUDADev​ice.hBuild during the training of a Convolutional Neural Network

Hello! I have this code:

layers = [imageInputLayer([28 28 1])
convolution2dLayer(5,20)
reluLayer
maxPooling2dLayer(2,'Stride',2)
fullyConnectedLayer(10)
softmaxLayer
classificationLayer()]; %define the Convolutional Neural Network (CNN)

options = trainingOptions('sgdm','MaxEpochs',15, 'InitialLearnRate',0.0001); %set the training options

convnet = trainNetwork(trainDigitData,layers,options); %train my CNN

and when I train the network I get all these errors:

• Error using parallel.gpu.CUDADevice.hBuild
• Error in parallel.gpu.GPUDevice.getDevice
• Error in parallel.gpu.GPUDevice.isAvailable
• Error in nnet.internal.cnn.util.isGPUCompatible
• Error in nnet.internal.cnn.util.GPUShouldBeUsed
• Error in trainNetwork>iSetupExecutionEnvironment
• Error in trainNetwork

[Joss Knight]

What is your version of MATLAB and what GPU do you have? Have you installed the latest NVIDIA driver for that device?