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Quick Start: Progress DataDirect for JDBC for Oracle Driver : Troubleshooting setup/connection issues : Troubleshooting the issue
  

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Troubleshooting the issue

Some common reasons that setup/connection issues occur are:
*The database and/or listener are not started.
*The driver jar file, oracle.jar, is not defined on your CLASSPATH. If the driver is not defined on your CLASSPATH, you will receive a class not found exception when trying to load the driver. See "Setting the classpath" for details.
*The JDBC driver’s connection properties are not set correctly in the connection URL or data source. See "Configuring a data source" for more information. For example, the host name or port number are not correctly configured.