build/creating_data/docker-images-collector.sh when executed with latest oom charts for aaf component inserts in to output file (onap_generated_docker_images.list) entry: 

nexus3.onap.org:10001/

which results in failure for 

/offline-installer/build/download/download.py  --docker onap_generated_docker_images.list

Downloading image: nexus3.onap.org:10001/
{{ 6 docker images left to download.}}
{{ Failed: nexus3.onap.org:10001/:latest: 400 Client Error: Bad Request ("invalid reference format"). Retrying...}}
{{  }}

The reason for that are charts for aaf. In latest version when helm template is executed for this charts it returns for one deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
{{ name: release-aaf-hello}}[...]
{{ spec:}}
{{ initContainers:}}
[...]
{{ - name: aaf-hello-aaf-config}}
{{ image: nexus3.onap.org:10001/}}
[...]