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After installing 10.0 Service Pack 2 for the ArcGIS License Manager on the Amazon EC2 platform, running the authorization wizard fails with the error:
"Input parameter hostId of TrustedHostEntityBO.createTrustedHostEntityBO cannot be null"
A system identification issue has been found with Amazon Cloud-based ArcGIS License Manager 10.0 deployments with Service Pack 2 installed.
If Service Pack 2 for ArcGIS License Manager 10.0 has been applied to an Amazon EC2-based license manager, Service Pack 2 should be removed and rolled back to 10.0 Service Pack 1.
If an Amazon Cloud image has not yet been created, do not install the ArcGIS License Manager 10.0 Service Pack 2 or the 10.0 Service Pack 1 License Manager Patch. There are no known issues with installing ArcGIS License Manager 10.0 or 10.0 SP1.
To roll ArcGIS License Manager 10.0 SP2 back to 10.0 SP1, follow the steps below to uninstall the ArcGIS License Manager from the system, re-install the ArcGIS License Manager 10.0, and apply SP1.
It is not necessary to de-authorize the ArcGIS License Manager any time during this process unless migrating to another server.