doc.FAQ.HowDoITroubleshootAFailedODBC-JDBCBridgeConnection

Ensure that the JDBC connection URL connects to the target database.
Ensure that OpenLink 's Single-Tier client components or Multi-Tier server components are installed on the machine that contains the JDBC connection URL.
Multi-Tier users ensure that oplrqb and a JDBC Bridge Agent (jdbc13_mv, jdbc14_mv, etc.) appear in the /bin sub-directory of the OpenLink server components installation.

Multi-Tier users ensure that oplrqb and the JDBC Bridge Agent (jdbc13_mv, jdbc14_mv, etc.) return version and usage information. For example:


> jdbc14_mv -? JDBC Database Agent (JDK 1.4)(multi threaded) Version 1.2 as of Thu Sep 04 2003 (Release 5.1 cvsid 00068). Compiled for Linux 2.2.25 (i686-pc-linux-glibc2.1) Copyright (C) OpenLink Software

Ensure that you pass the exact JDBC driver name string and JDBC connection URL in your OpenLink Data Sources. You can test the driver name string with the java command. It should return version and release information. For example:
```
> java openlink.jdbc3.Driver OpenLink Generic Driver for JDBC(TM) 3.0 Version 04.19 (Release 5.1) 
```
Multi-Tier users ensure that JDBC 1.1, JDBC 1.2, JDBC 1.3, or JDBC 1.4 appears in the Domain or Server Type field of the Multi-Tier Data Source Name. (Case and spacing matter!)
Unix Single-Tier users ensure that JDBC 1.1, JDBC 1.2, JDBC 1.3, or JDBC 1.4 appears in the Existing Environment field of the Single-Tier Data Source Name. (Case and spacing matter!)
Single-Tier Installation or Connection Problem

Multi-Tier Installation or Connection Problem