CWSTM0004E The connection to the data source with a JNDI name of jdbc/WPSDB that is used to hold business rules and selectors failed as it may not have been created or it is unreachable.

Explanation
Possible causes of the problem are, if the database is local, the database has not been started, or if the database is remote, network connectivity is not established.
User response
If the database is local to the system where the server is running, make sure that the database has been started. If the database is on a remote system, make sure that the network connectivity to the remote system and the database are active. You can also use the test connection option in the administrative console to test general connectivity to the database. If the problem persists, refer to the Troubleshooting guide on the IBM Workflow Server.