A deployed application must be able to access all the classes required for BIRT, the external data sources, and any other necessary classes. Set up the BIRT home directory and the CLASSPATH for the application.

If you use or customize the BIRT source code, ensure that the version that your application uses matches the version of the plug-ins and libraries in the BIRT home directory. If these versions are not the same, the reporting application is likely to fail.