Import XML file with Header, Detail, and Trailer section in SSIS - sql

Question

I am attempting to load an XML file through SSIS. I want to note that I did generate the XSD through SSIS. Here is the sample file which I was able to load successfully:
<?xml version="1.0" encoding="UTF-8"?>
<ACOParticipantData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Header>
<HeaderCode>HDR_PRVDR</HeaderCode>
<FileCreationDate>20160101</FileCreationDate>
<ACOProgCode>21</ACOProgCode>
</Header>
<Participants>
<Participant>
<ACO_ID>V199</ACO_ID>
<TIN>123456789</TIN>
<Old_TIN>987654321</Old_TIN>
<Org_NPI>1234567890</Org_NPI>
<Ind_NPI>1234567890</Ind_NPI>
<CCN>123456</CCN>
<PRG_Eff_Dt>20160101</PRG_Eff_Dt>
<PRG_Term_Dt>20161231</PRG_Term_Dt>
<ErrorCode>44</ErrorCode>
</Participant>
</Participants>
<Trailer>
<TrailerCode>TRL_PRVDR</TrailerCode>
<FileCreationDate>20160101</FileCreationDate>
<RecordCount>1</RecordCount>
</Trailer>
</ACOParticipantData>
The production file has the same format but I am now receiving the below error in SSIS:
[XML Source [79]] Error: The XML Source was unable to process the XML
data. The Xml source document contains the "xsi:nil" attribute with a
value of true on the "Old_TIN" element, therefore the element must be
empty.
However, there doesn't seem to be anything erroneous about the source file. How would one go about debugging and ingesting this file successfully?
EDIT:
Out of the two production files, I've altered the smaller one slightly but it will look like this:
<?xml version="1.0" encoding="UTF-8"?>
<ACOParticipantData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Header>
<HeaderCode>HDR_PRVDR</HeaderCode>
<FileCreationDate>20160602</FileCreationDate>
<ACOProgCode>21</ACOProgCode>
</Header>
<Participants xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Participant>
<ACO_ID>V130</ACO_ID>
<TIN>123456789</TIN>
<Old_TIN xsi:nil="true">
</Old_TIN>
<Org_NPI xsi:nil="true">
</Org_NPI>
<Ind_NPI>0987654321</Ind_NPI>
<CCN xsi:nil="true">
</CCN>
<PRG_Eff_Dt>20160101</PRG_Eff_Dt>
<PRG_Term_Dt>20160601</PRG_Term_Dt>
<ErrorCode>00</ErrorCode>
</Participant>
<Participant>
<ACO_ID>V130</ACO_ID>
<TIN>111222333</TIN>
<Old_TIN xsi:nil="true">
</Old_TIN>
<Org_NPI xsi:nil="true">
</Org_NPI>
<Ind_NPI>4445556667</Ind_NPI>
<CCN xsi:nil="true">
</CCN>
<PRG_Eff_Dt>20160101</PRG_Eff_Dt>
<PRG_Term_Dt>20160601</PRG_Term_Dt>
<ErrorCode>00</ErrorCode>
</Participant>
</Participants>
<Trailer>
<TrailerCode>TRL_PRVDR</TrailerCode>
<FileCreationDate>20160602</FileCreationDate>
<RecordCount>2</RecordCount>
</Trailer>
</ACOParticipantData>

Answer 1

Search for xsi:nil="true" in your real data XML.
Being empty or being NULL is close but not exactly the same. In some cases this is needed to be distinguished.
If an element is marked as NULL like - in your case probably: <Old_TIN xsi:nil="true"> there should be no value for this element.
If there is the xsi:nil flag and a value it's a contradiction...
UPDATE
According to your edits you find this there (reduced)
<Participant>
<Old_TIN xsi:nil="true">
</Old_TIN>
<Org_NPI xsi:nil="true">
</Org_NPI>
<CCN xsi:nil="true">
</CCN>
</Participant>
These elements are not NULL, they contain a line break and spaces... Try change this to
<Participant>
<Old_TIN xsi:nil="true"/>
<Org_NPI xsi:nil="true"/>
<CCN xsi:nil="true"/>
</Participant>