releaseGroups [<group> ...]
With no arguments, this returns a list of held groups. Otherwise, this resumes normal input and activity updates on the list of groups.
With standard networks, error derivatives have accumulated and will be backpropagated once the groups are released. This has no effect unless groups are released during training prior to a weight update.
With the argument *, rather than a list of groups, all held groups will be released.
To release the "input" and "hidden1" groups:
lens> releaseGroups input hidden1
To release all held groups:
lens> releaseGroups *