Hi,
Note 1899396 - Patch Level 0 for BI Java Installation - Detailed Information
If you missed to apply the latest patches for the current BI-JAVA stack you will encounter all kinds of errors.
New Installation of SAP BI JAVA 7.30 - Options, Connectivity and Security
Note 1512355 - SAP NW 7.30/7.31/7.40: Schedule for BI Java Patch Delivery
Best Regards Roland