IBM produces a number of z/OS mainframe Java products. ReportCenter requires a Java runtime environment at version 1.4.2 or higher. SDK Version 1.4.2 or Version 5 is available by installing IBM SDK for z/OS™ Java™ 2 Technology Edition Version 1.4 or Version 5.
See the IBM website for service level and prerequisite information and ensure that you have installed all these prerequisites. They may be for components other than Java, such as Language Environment for z/OS.
This product is available from IBM in SMP/E and non-SMP/E formats through normal ordering channels, or by downloading the product from the web. For more information about how to obtain and install this product, see the IBM website.
You may already have one or more mainframe Java products installed. Java products may be installed automatically with some CBIPO configurations, or with products such as IBM's WebSphere. The version and maintenance level of Java depends on the operating system or product level involved.
If this Java product is at a recent maintenance level of SDK Version 1.4.2, SDK Version 5 or later, it can also be used for ReportCenter. IBM provides regular service updates to the mainframe Java products. Ensure that you have installed the latest maintenance level for your Java product.
You can execute IBM JVM processing cycles on a zAAP (IBM System z Application Assist Processor) specialty engine if it is configured. This may help to reduce z/OS Java application capacity requirements.
Note: For more information, see the IBM zAAP documentation.