ArcGIS Authorization Error: 7174

When installing an evaluation copy of ArcGIS Desktop 10, you may receive an error message during authorization saying something like “7174: Authorization request for EVA123456 cannot be completed.”  Trial and error suggests that this error is caused by a conflict with a previously authorized installation using a different evaluation code.  Even though you may have uninstalled your previous evaluation software, and the installer detected no conflicts, there may still be flags in the registry referring to the previous installation.  This is ostensibly to prevent you from coasting forever with free evaluation software.  After evaluating an ESRI product, you should consider purchasing a long-term license.

However, students who switch from 60-day to one-year evaluation licenses cannot be faulted for wanting to do their homework.  Unfortunately, the one sure way to clear this error is to reinstall Windows from scratch.

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