000780: Checking in data is not supported on this geodatabase release.

Description

Checking in data from a checkout is not supported in the release of the geodatabase you are connected to. This type of replication functionality is supported at ArcGIS 8.3 and later. If you receive this error, it means that a geodatabase you are connected to is from an earlier version.

Solution

You must use geodatabases with a minimum release version of 8.3.