Hi, I thought about SP1 and installed it yesterday (after my posting). But no change. I have tried with different data several times to create a dataset. Always the same result. In the ArcAdministrator the license for Network Analyst is enabled and valid for a year (Education license). But when I try to start a tool from the ArcToolbox -> Network Analyst toolset I get a message about a missing license and that the extension is not enabled. How to enable the extension when the license seems to be fine in the ArcAdministrator? Do I need to install the License Manager? I would expect that the toolbar should not work and adding a new route should not be possible if there is a general license issue. Strange is that the Network Analyst functions become visually enabled when I select the "customize" function (see attchment). But it goes away when I close it. I do not know about a separate Network Analyst window (newbie). I know just the toolbar and the route entry in the table of contents when trying to create a new route. regards Christian
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