Error using gpuArray/imresize

[SuyuanLiu]

MATLAB:2015b CUDA:8.0

When I run STMulNet.m , it comes the bug:

Error using cnn_train_dag (line 136)
Error detected on workers 1 2.

Error in STMulNet (line 674)
[info] = cnn_train_dag(net, imdb, fn, opts.train) ;

Caused by:
    Error using gpuArray/imresize (line 46)
    Expected input scale to be a real, positive scalar of numeric type on the CPU.
    Error using gpuArray/imresize (line 46)
    Expected input scale to be a real, positive scalar of numeric type on the CPU.

I'm not sure what's wrong? @feichtenhofer