NNO-00262
warning: cannot write checkpoint file "string"
Cause
the server was unable to write the named checkpoint file. This problem is typically due to the file system's protection settings. The error is not fatal; it simply means the server will not create any checkpoint data. Note, however, that if the configuration database is ever unavailable during a future server startup, the lack of checkpoint data means you will be unable to force a startup from checkpoint data with the names.no_region_database parameter.
Action
Check to see that the server has permission to write the file named in the error message.