Steps to resolve the problem:
- Make sure that the JDBC driver is in your classpath for both BW and Designer by checking your .tra files (TIBCO_HOME\bw\5.10\bin\bwengine.tra and TIBCO_HOME\designer\5.7\bin\designer.tra). This could be done by dropping the driver .jar in TIBCO_HOME\tpcl\5.7\lib
Add the following line to your BW and Designer .tra files:
java.property.TIBCO_SECURITY_VENDOR=j2se
You may also have to perform the above for other TIBCO software such as Hawk and Administrator, depending on your setup.