loss = nan?

[WangXin93]

Hi，I Just ran your project follow the instruction. I installed all the dependencies, and changed ann_path and img_dir to my file path. However, I get this loss = nan, is that normal? Can you give me some suggestions? Thanks a log! :cake:

Train Iteration: 50	Time 28.197s / 50iters, (0.564)	Data load 16.160s / 50iters, (0.323203)
Learning rate = 4e-05
Loss = nan (ave = nan)

Loss1_1 = nan (ave = nan)
2018-05-25 11:58:20 -----------------------------------------------------------------------------------------------------------------

Train Iteration: 100	Time 23.110s / 50iters, (0.462)	Data load 17.250s / 50iters, (0.344995)
Learning rate = 4e-05
Loss = nan (ave = nan)

[chiragbajaj25]

Instead of sgd try using Adam optimizer, it worked for me.