error while debugging BAPI_MATERIAL_SAVEDATA

hi all,

i have few doubts:

1)

well i am using 'BAPI_MATERIAL_SAVEDATA' to transfer the data from one user defined table to material master table, i want to know am i using the correct function module

2)

secondly when i am debugging the 'BAPI_MATERIAL_SAVEDATA' function module i am getting the following error

'No description transferred'

i am passing the following value:

in headdata:

material = 18

indsector = m

matltype = ROH or DIEN

in clientdata:

material group = 001

base_uom = 003

base_uom_iso = kg

in cliendatax

material group = X

base_uom = X

base_uom_iso = X

also i want to know what happens if we dont pass value in clientdatax