XML to language structure conversion imposes a limit on the length of XML documents that can be converted into language structures. The maximum length in bytes of the input XML document is 16MB when version 3 of Enterprise COBOL for z/OS is used and 32MB when version 4 of Enterprise COBOL for z/OS is used.
IBM Rational Developer for System z will normally prevent generation of XML to language structure converters when it is detected that an input XML message can exceed the 16MB or 32MB respective limit. Check that the input XML message conforms to the XML Schema upon which it is based and that any whitespace outside of element content has been trimmed.