BUG
After upgrading the NITF for ArcGIS for Server extension from 10.1 to 10.2 (NITF extension version 1.4 to 1.4.2.1), image services that serve NITF images may not start.
The issue applies to the upgrade scenario under same user account.
The issue does not happen if NITF extensions have not been installed before, or if the NITF extension for ArcGIS for Server 10.2 is installed using a different user account.
The NITF extension is not able to overwrite a preference setting file left over by previous versions.
C:\Users\USER_NAME\.idl\itt\components-37-4_8-win32-m64
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