Problems loading IDOC Flat file to IDOC XML format

Hi All.

I have a scenario that I created an interface to convert standard IDOC flat files to a XML IDOC using the module SAP_XI_IDOC/IDOCFlatToXmlConvertor

However the Flat file IDOC which I want to load is 640 version as you can the header below it doesnt work. I tried to import a file in 702 version with some minor differences in the content of the file and it worked, but we CAN`T apply these minor differences hence we can´t load these 702 file. it should be able to load this 640 file as the image shows below.

Has someone already seen similar scenario like mine?

Appreciate your help.

Regards,

Diego