I have virtually completed a basic database management application in Netbeans, saved to and running off a flash drive. Unfortunately, the main computer I was using broke down, now I would like to run the program on another system, however, am getting a persistence error that has left me completely lost (despite following what I believed to be the right steps to allow the program to run off the drive on another computer at the beginning). The database is located on and saved to the flash drive. Can anyone help? I have tried altering the address name in the persistence.xml file to no avail.
This is the error:
[EL Info]: 2018-10-03 16:07:22.109--ServerSession(2101086700)--EclipseLink, version: Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd [EL Severe]: ejb: 2018-10-03 16:07:22.116--ServerSession(2101086700)--Exception [EclipseLink-4003] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4003] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException Exception Description: Configuration error. Class [org.apache.derby.jdbc.EmbeddedDriver] not found. Exception Description: Configuration error. Class [org.apache.derby.jdbc.EmbeddedDriver] not found. at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:766) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:204) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:304) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:336) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:302) at datsneakers.DisplayGUI.initComponents(DisplayGUI.java:69) at datsneakers.DisplayGUI.(DisplayGUI.java:42) at datsneakers.DatSneakers.main(DatSneakers.java:6) Caused by: Exception [EclipseLink-4003] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException Exception Description: Configuration error. Class [org.apache.derby.jdbc.EmbeddedDriver] not found. at org.eclipse.persistence.exceptions.DatabaseException.configurationErrorClassNotFound(DatabaseException.java:89) at org.eclipse.persistence.sessions.DefaultConnector.loadDriverClass(DefaultConnector.java:267) at org.eclipse.persistence.sessions.DefaultConnector.connect(DefaultConnector.java:85) at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162) at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.setOrDetectDatasource(DatabaseSessionImpl.java:204) at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:741) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:239) at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:685) ... 7 more
Please bear with me, I am a relatively amateur programmer. Any help appreciated.
