You are starting a deliver operation without a view context, and must specify a source stream for the operation. If you have a UCM view context, the deliver operation uses the stream to which the view is attached. Select a development stream whose activities (or baselines) will be delivered. You can change the default view selected or create a new view.
On Linux and the UNIX system, all PVOBs and streams are shown. Navigate to the PVOB containing the related project, select the stream, and click OK.
On Windows, if this is the first time that you are selecting a stream on this computer, all PVOBs and UCM folders and projects are shown. If this is not the first time, you see the last PVOB that you selected. By default, only streams that you have created are shown.