Do I need my databases' client software to be installed to connect r9.x CA ERwin DM to the r9.x Mart? Matt Russo Updated November 05, 2019 14:25 Follow Solution: no database client software is needed for r9 CA ERwin DM to connect to the r9 mart. r9 ERwin establishes the connection to the mart using JDBC (Java Database Connectivity). Related articles r9 CA ERwin Mart Administrator: when attempting to get to the CA ERwin Mart Administrator page, I got an " Application Internal Error ". The Tomcat window shows, ORA-12514, TNS:listener does not currently know of service requested in connect descriptor. Error 1918. Error installing ODBC driver erwin r8.2 DataDirect OpenAccess, ODBC error 13: The setup routines for the erwin r8.2 DataDirect OpenAccess ODBC driver could not be loaded due to system error code 126 How may I troubleshoot the way my r9 mart connects to Oracle DBMS? 'Mart Version validation failed' error when connecting to Mart on Citrix How to check what specific processes or applications are accessing what ports on my Windows device? Comments 0 comments Please sign in to leave a comment.