A checkpoint is a representation of all SQLstream Repository content, both metadata and local data. It provides a “known good point” in the event of a crash or other disruption. (s-Server checkpoints are persistent, not streaming.)
The first time you run the server, it creates a checkpoint. Before you run the server for the first time, you cannot restore the catalog because no checkpoint exists.
See the Working with Checkpoints topic in the Administration Guide for more information.