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When attempting to launch ArcMap, the following error message is returned:
Error: "Not_Set" is an invalid hostname. Please enter a valid hostname.
The error occurs when a 'Concurrent Use' license level is selected in ArcGIS Administrator, and no License Manager is defined.
To circumvent the issue, follow the steps below:
Last Published: 8/12/2020
Article ID: 000019515
Software: ArcMap 10.8.1, 10.8, 10.7.1, 10.7, 10.6.1, 10.6, 10.5.1, 10.5, 10.4.1, 10.4, 10.3.1, 10.3, 10.2.2, 10.2.1, 10.2, 10.1, 10