Error compiling Matconvnet with gpu

hello everyone

I am using MATLAB 2019b, CUDA toolkit 10.1 and visual studio 2017.

I am able to compile the CPU version. but here is the error I get while compiling GPU version.

vl_compilenn('enableGpu', true, ...

'cudaRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1', ...

'cudaMethod', 'nvcc', ...

'enableCudnn', true, ...

'cudnnRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1');

the message error:

nvcc fatal : '-DNDEBUG': expected a number

Error using vl_compilenn>nvcc_compile (line 615)

Command "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin\nvcc" -c -o

"G:\matconvnet-1.0-beta25\matlab\mex\.build\bits\data.obj"

"G:\matconvnet-1.0-beta25\matlab\src\bits\data.cu" -DENABLE_GPU -DENABLE_DOUBLE -DENABLE_CUDNN

-I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" -O -DNDEBUG -D_FORCE_INLINES

--std=c++11 -I"G:\programme\extern\include" -I"G:\programme\toolbox\distcomp\gpu\extern\include"

-gencode=arch=compute_61,code=\"sm_61,compute_61\" --compiler-options=/MD

--compiler-bindir="C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\bin" failed.

Error in vl_compilenn (line 487)

nvcc_compile(opts, srcs{i}, objfile, flags) ;

[Dhruti r]

same error can anyone help please...!!