-[What IP's do I use to allow connections to/from HCC resources?](#what-ip-s-do-i-use-to-allow-connections-to-from-hcc-resources)
-[Why my job is showing (ReqNodeNotAvail, Reserved for maintenance) before a downtime?](#why-my-job-is-showing-reqnodenotavail-reserved-for-maintenance-before-a-downtime)
-[Why my Open OnDemand JupyterLab/Interactive App Session is stuck and is not starting?](#why-my-open-ondemand-jupyterlab-interactive-app-session-is-stuck-and-is-not-starting)
-[Why I can not access files under shared Attic/Swan Globus Collection?](#why-i-can-not-access-files-under-shared-attic-swan-globus-collection)
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@@ -257,3 +258,8 @@ The most common reason for this is full `$HOME` directory. You can check the siz
Then, please remove any unnecessary data; move data to [$COMMON or $WORK]({{<relref"../handling_data/">}}); or [back up important data elsewhere]({{<relref"../handling_data/data_storage/preventing_file_loss.md">}}).
If the majority of storage space in `$HOME` is utilized by `conda` environments, please [move the conda environments]({{<relref"../applications/user_software/using_anaconda_package_manager#moving-and-recreating-existing-environment">}}) or [remove unused conda packages and caches]({{<relref"../applications/user_software/using_anaconda_package_manager#remove-unused-anaconda-packages-and-caches">}}).
#### Why I can not access files under shared Attic/Swan Globus Collection?
In some occasions, errors such as _"Mapping collection to specified ID failed."_, may occur when accessing files from shared Attic/Swan Globus Collection.
In order to resolve this issue, the owner of the collection needs to login to Globus and activate the `hcc#attic` or `hcc#swan` endpoint respectively.
This should reactivate the correct permissions for the collection.