JDeveloper and Oracle XML Database Development

Hello, folks:
I am trying to create XML database through JDeveloper.
Database: Oracle 10g
IDE: JDeveloper 11.1.2.2.0
JDBC Driver: Oracle ojdbc6.jar
I connect successfully to the database through JDeveloper. There I see many folders listed, e.g. Tables, Views, Indexes, XML Schemas, XML DB Repository, and others. My problem is that when I try to save a large schema file (that I already validated on my local machine) that is roughly more than 300 lines, then JDeveloper is unable to save the file. It saves only very small files that are about 100 lines or less. The error message simply is: "Unable to save XML Schema blah.filename@local (Error saving XML Schema).
I tried to do it in Oracle SQL Developer, but got the same error. Can someone please help me understand this problem and how to fix it? Do I need to specify some settings in JDeveloper or SQL Developer? Thanks a lot in advance.
Asif

The XML database engine used in JDev is in fact from SQL Developer. In other words the SQL Developer code base is used by JDev though typically it is an older version than the latest SQL Developer. As such best post this question to the SQL Developer forum and ensure to state which standalone SQL Developer version you're using.
CM.

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