Error in BAPI_MATERIAL_SAVEREPLICA + Planned DeliveryTime update of Materials

Hi All,

I am updating Planned Delivery Time in MRP2 view of material in MM02 via BAPI_MATERIAL_SAVEREPLICA .

for ex -

Material - 12345( its 16digit)  , Plant - 1111  & 2222 .

So I want to update the Planned delivery Time for this material 12345 for both  plant 1111, 2222 .

Say PDT for material 12345, Plant -1111  -> needs to be updated as 10   and

                    Material  12345 , Plant - 2222 -> needs to be updated as 20 .,      

But Its not updating , In Debug , I found inside this BAPI_MATERIAL_SAVEREPLICA ,there is a perform statement

PERFORM DEL_DUPLICATE_RECORDS for deleting duplicate records based on Material , so as a result its deleting 1 row .,and its gets failed This perform actually deletes data from CLIENTDATA internal table based on Material .

How to rectify this error, please give some idea.

Code is as below - :

for BAPI, I am passing these values

HEADDATA  -> MATNR              = 12345

                      -> Basic_view        =  'X' ,  -Purchase_View =  'X' ,  MRP View          = 'X'

CLIENTDATA - >    MATERIAL = 12345 , OLD_MAT_NO = 12345 ,  (2 rows of records with same material)

CLIENTDATAX->   MATERIAL = 12345 , OLD_MAT_NO = 'X' ,   

PLANTDATA - >     MATERIAL = 12345 , PLANT = 1111 & 2222 , PLND_DELRY = 10 & 20 .

PLANTDATAX->     MATERIAL = 12345 , PLANT = 1111 & 2222, PLND_DELRY = 'X'              .

Please suggest whats wrong I am doing. Also is there any BAPI we can use instead of BAPI_SAVEDATA , I want to update multiple materials at one go , so choosed  this BAPI_SAVEREPLICA  . .

Waiting for some suggestions !!!!