training demo doesn't work

[cslxiao]

When I run the training demo LRR4xTrainVGG16Pascal, it goes fine at the beginning. However, after several iterations, I got the following output:

obj_dil_seg32x: NaN obj_ero_seg32x: NaN objective_32x: NaN

What's wrong with it? I didn't change anything expect for the directories of the dataset.

[golnazghiasi]

I'm not sure why this is happening. I remember I had the exact same problem with the training code of fcn-matconvet (https://github.com/vlfeat/matconvnet-fcn). I could resolve the problem by using a smaller learning rate for just first few epochs. Maybe you can also try this.
Can I ask what version of Matconvnet do you use? Also what is your gpu?

[cslxiao]

Thanks @golnazghiasi .
I used the latest version of Matconvnet (master branch) on the github.
And I am using Titan X.