File Content Conversion in SAP CPI using format conversion bean

Hello Experts,

I'm getting below error while converting flat file into XML using conversion bean ( https://blogs.sap.com/2018/09/04/formatconversionbean-arrives-in-cpi/ )

Following is the detailed configuration :

Expected XML Output is as follow :

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<ns:MT_BNI1011 >
<Record>
<DT_BNI1011_H>
:
</DT_BNI1011_H>
<DT_BNI1011_L1>
:
</DT_BNI1011_L1>
<DT_BNI1011_T>
:
</DT_BNI1011_T>
</Record>
<Record>
:
:
:
</Record>
</ns:MT_BNI1011>

Thanks in advance.