Material master creation error through LSMW

Hi,

I have a problem with creation material master through LSMW with object type BAPI. I use below import methods

Business Object BUS1001006

Method SAVEDATA

Message Type MATMAS_BAPI

Basic Type MATMAS_BAPI03

Material number is configured length of 12 with leading zeros.

In my text file material number is given as XXXXXXXXXXX which is 11 digits. When I start IDoc processing it issues an error message u201CMG019 the numeric material number & was transferred without leading zerosu201D.

Then I add 0 to material number in the file (it becomes 0XXXXXXXXXXX) and run IDOC processing it issues same error message again.

How I can resolve this issue?

Thanks