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 January 17, 2017 20:19 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. 'Mart Version validation failed' error when connecting to Mart on Citrix How to move a r7 / r8 mart from one SQL Server to another? Scenario: Upgrading the Mart How may I troubleshoot the way my r9 mart connects to Oracle DBMS? Comments 0 comments Please sign in to leave a comment.