New browsers sometimes also need to be reconfigured for the APC proxy . The newest browsers do not support APC, so you may not want to upgrade until your favorite resources are migrated off of the APC proxy. If you are told that all of the licenses are in use or that the resource has reached the maximum allowed users, you will need to wait a few minutes and then try the resource again. We are notified whenever users are rejected for this reason. If the problem is chronic, we will try to arrange for the purchase of additional licenses.
Some resources are no longer available.
Others are no longer free and funding could not be found. Trial subscriptions sometimes expire before a sponsor for the resource could be found. If you would like us to reinstate a resource, please let us know. If you encounter a URL change please notify us so we can update our database immediately. If the access to the resource is restricted, a URL change can and usually will break the resource.