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During the installation of ArcGIS Server, the following error message appears:
"Error 1904. Module C:\Program Files\ArcGIS\bin\SceneGraph.dll failed to register. HRESULT -2147024769. Contact your support personnel."
The SceneGraph.dll failed to register during the installation.
The .dll needs to be registered with Windows after the installation completes.
regsvr32 "C:\Program Files\ArcGIS\bin\scenegraph.dll"
This problem can also be resolved by applying the most recent ESRI Service Pack found in the Related Information below.