Out of Memory on External Processes

Problem

Oxygen XML Author Eclipse plugin throws an Out Of Memory error when trying to generate PDF output with the built-in Apache FOP processor.

Cause

The amount of allocated memory might be insufficient.

Solutions

Open the Preferences dialog box , go to XML > PDF Output > FO Processors, and increase the value of the Memory available to the Apache FOP option.
For external XSL-FO processors, XSLT processors, and external tools, the maximum value of the allocated memory is set in the command line of the tool using the -Xmx parameter set to the Java virtual machine.