bash test_mask_refine.sh config_vot.json SiamMask_VOT.pth VOT2016 0

(siammask) [liqiang@inspur siammask]$ bash test_mask_refine.sh config_vot.json SiamMask_VOT.pth VOT2016 0 [2019-03-14 19:42:16,619-rk0-test.py#551] Namespace(arch='Custom', config='config_vot.json', dataset='VOT2016', gt=False, log='log_test.txt', mask=True, refine=True, resume='SiamMask_VOT.pth', save_mask=False, visualization=False) [2019-03-14 19:42:17,087-rk0-load_helper.py# 31] load pretrained model from SiamMask_VOT.pth [2019-03-14 19:42:20,119-rk0-load_helper.py# 25] remove prefix 'module.' [2019-03-14 19:42:20,121-rk0-load_helper.py# 18] used keys:356 [2019-03-14 19:42:20,184-rk0-test.py#595] Total Lost: 0 /export/userhome/liqiang/liqiang/Anaconda/ENTER/envs/siammask/lib/python3.6/site-packages/numpy/core/fromnumeric.py:2925: RuntimeWarning: Mean of empty slice. out=out, **kwargs) /export/userhome/liqiang/liqiang/Anaconda/ENTER/envs/siammask/lib/python3.6/site-packages/numpy/core/_methods.py:85: RuntimeWarning: invalid value encountered in double_scalars ret = ret.dtype.type(ret / rcount) [2019-03-14 19:42:20,185-rk0-test.py#597] Mean Speed: nan FPS

when I run this file as what you write on readme.md, the result is like this what's wrong with this error?