I'm new to DeepCognition ,i m trying to use pre trained vgg but is shows error when download the weights

URL fetch failure on https://github.com/fchollet/deep-learning-models/releases/download/v0.1/vgg16_weights_th_dim_ordering_th_kernels_notop.h5: None – [Errno 11001] getaddrinfo failed

The link you provide as extra : at the end.

If DLS is not able to download the weight file, you can manually download it and copy it in <DLS_DATA_FOLDER>/keras/models location.