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Symptom

Connection to DTR fails. When trying to connect to the Design Time Repository (DTR) from Internet Explorer, the following exception error is thrown:

javax.servlet.ServletException:

ResourceException in method ConnectionFactoryImpl.getConnection(): com.sap.engine.services.dbpool.exceptions.BaseResourceException:

SQLException thrown by the physical connection: com.sap.dbtech.jdbc.exceptions.JDBCDriverException: SAP DBTech JDBC:

Cannot connect to jdbc:sapdb:// ://<system name>/<database instance name> \

Cannot connect to host <system name>

Connection refused: connect, -813.

When trying to connect to DTR using a standalone client, the following error message is thrown.

500 Internal Server error.

Is your database up and running?

yes
no: please start the database