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FAQ: Can ArcGIS products (ArcGIS, ArcIMS, ArcSDE) of different versions be installed on the same computer?

Question

Can ArcGIS products (ArcGIS, ArcIMS, ArcSDE) of different versions be installed on the same computer?

Answer

No. All products on a computer must have the same version since there are libraries shared between ArcGIS applications. For example, ArcGIS Desktop 9.1 cannot be installed on a computer that has ArcIMS 4.0.1 already present.