XML report issue

I have created a xml report in this way

for-each LIST_G_SEGMENT1

Vendor Name	Segment1
F VENDOR_NAME	SEGMENT1 E

end LIST_G_SEGMENT1

But when I ran the report, this error was occurred

Post-processing of request 944365 failed at 08-NOV-2016 06:50:31 with the error message:

One or more post-processing actions failed. Consult the OPP service log for details.

CONC-POST-PROCESSING RESULTS

-- PUBLISH:

oracle.apps.fnd.cp.opp.PostProcessorException: oracle.apps.fnd.cp.opp.PostProcessorException: oracle.apps.xdo.XDOException

+---------------------------------------+

* But when then I have created xml report in this format, it ran correctly

<?for-each:LIST_G_SEGMENT1?>

Vendor Name	Segment1