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Opening file geodatabase data that was compressed in ArcGIS 10.1, results in a crash if opened in ArcGIS 10.0.
ArcGIS 10.1 uses a new compression algorithm which provides improved compression ratios and lossless compression for floating point numbers. However, ArcGIS 10.0 is unable to read this new compression format and ArcGIS 10.1 does not have an option to use the old compression format on 10.x geodatabases.
While there is not option to use the old compression format with 10.x geodatabases, the file geodatabase compression tool can use the old compression format with pre-10.x geodatabases. Use the following steps to use ArcGIS 10.1 to provide a readable compressed format for ArcGIS 10.0: