Oracle BPEL, unable to generate native format

In my current project i need to build some integration to a cobol application.
To generate the interface used from within bpel the cobol team supplies the copybook file which i can use in bpel to generate the xsd by use of the Native Format Builder.

Generating the xsd gave me the next error : ‘Unable to generate native format’.

Check the copybook file and check if the array element is defined as
[sourcecode language=”xml”]
15 POITEM OCCURS 3 TIMES.
[/sourcecode]

instead of
[sourcecode language=”xml”]
15 POITEM OCCURS 3.
[/sourcecode]