Out of Memory on External Processes

Problem

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

Solution

Open the Preferences dialog box (Options ⇒ Preferences), go to XML ⇒ XSLT-FO-XQuery ⇒ FO Processors, and increase the value of the Memory available to the built-in 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.