Apache Derby DB Error Code XRE40 – Could not perform operation because the database is not in r

In this blog post, let’s learn about the error message “XRE40- Could not perform operation because the database is not in r” in Apache Derby Database and the description of the error.

Error Message

XRE40- Could not perform operation because the database is not in r

Error Details

Could not perform operation because the database is not in replication slave mode.