XML DB :: Error When Parsing XML Data That Is Loaded Using SQL Loader

I am loading content of an XML file into a table using SQL loader.Below is my Control file script -

LOAD DATA
INFILE *
INTO TABLE xx_cc_response_xml_stg TRUNCATE
xmltype(XML_DATA)
FIELDS
( COLUMN_ID constant 1,
file_name filler char(4000),
XML_DATA LOBFILE(file_name) TERMINATED BY EOF)
BEGINDATA
B2B_MasterDataUpdate_20120906152137.xml
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The file B2B_MasterDataUpdate_20120906152137.xml is correct and XML is well formed.When i try to query for XML_DATA (datatype XMLType) column in the table, i cannot see any content in the record, and it appears as (XMLTYPE)When I parse this XML using the below,

select value(d)
from xxnbn_cc_response_xml_stg a,
table(xmlsequence(extract(a.xml_data,'/InventorySearch'))) d;
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I get this error:
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ORA-00600: internal error code, arguments: [qmcxdsSelf4], [], [], [], [], [], [], [], [], [], [], []
00600. 00000 - "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause:    This is the generic internal error number for Oracle program
exceptions.     This indicates that a process has encountered an
exceptional condition.
*Action:   Report as a bug - the first argument is the internal error number
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