com.ibm.wps.command.MissingParameterException: EJPEB0612E: AbstractXmlExtractCommand Missing Parameter.

solution:

Problem: Error occurs when exporting files from various portlets

When you export files from the Manage Pages, Template Library or Policy administrative portlets, you may receive one of the error messages below if using Internet Explorer:

• Manage Pages portlet: com.ibm.wps.command.MissingParameterException: EJPEB0612E: AbstractXmlExtractCommand Missing Parameter.
• Template Library portlet: You will get an error message or message in browser information bar
• Policy portlet: XML document must have a top level element. Error processing resource

Cause: Browser security settings prevented the browser from downloading the file export.

Solution: Perform the following steps:

1. Open your Internet Explorer browser.
2. Click Tools > Internet Options.
3. Click the Security tab.
4. Click the Custom Level button.
5. Under the Downloads section, click the Enable radio button under Automatic prompting for file downloads.

http://publib.boulder.ibm.com/infocenter/wpdoc/v6r0/index.jsp?topic=/com.ibm.wp.zos.doc/wps/tbl_adm.html