ERROR consistency check in recordset structure

Hello All,

Below is my input file format looks like:

HEADER

REC_1

REC_1

REC_1

REC_2

FOOTER

And I have defined the Recordset structure as HEADER,1,REC_1,*,REC_2,*,FOOTER,1.But the occurence of REC_2 is optional (0 to Unbounded).

Conversion of file content to XML failed at
position 0: java.lang.Exception: ERROR consistency check in recordset structure
validation (line no. 4: missing structure(s) before type 'HEADER'

It looks like the error is due to missing REC_2 segment in the input file.

Can you please tell me how to handle this in FCC

Thanks,