Relation between " MVER_WRITE_FILE" and "MVER_DI" purpose is to load Consumption and Unplanned consumption into SAP

Hi All,

Can any one explain what is the relation between the  " MVER_WRITE_FILE" and "MVER_DI"  . I want to update the MVER table.

I know following things

1.) The " MVER_WRITE_FILE" will generate the below following file format.

MANDT  LIKE MVEG_UEB-MANDT,

MATNR  LIKE MVEG_UEB-MATNR,

WERKS  LIKE MVEG_UEB-WERKS,

ERTAG  LIKE MVEG_UEB-ERTAG,

GVBWRT LIKE MVEG_UEB-VBWRT,

GKOVBW LIKE MVEG_UEB-KOVBW,

GANTEI LIKE MVEG_UEB-ANTEI,

UVBWRT LIKE MVEU_UEB-VBWRT,

UKOVBW LIKE MVEU_UEB-KOVBW,

UANTEI LIKE MVEU_UEB-ANTEI.

What values i have to pass to generate the above files.

2.) I want to know how the "BAPI_MATERIAL_SAVEREPLICA " will work for updating the "MVER" table.

Please help me .

Thanks & regards

Vamc