BW create master data automatically

Question

Hi,
I'm facing an annoying problem:
I have loaded the master data for IO ZFIABC:
E.g ZFIXYZ  ZFIABC
     111     2
     222     3
Update rule: when you find value 111 for ZFIXYZ, the value of ZFIABC is 2.
When I load InfoPackage A, everything works fine. When the system finds the value 111 for ZFIXYZ, the value of ZFIABC is 2.
When I load InfoPackage B, this doesn't work right. the value 111 for ZFIXYZ gets a (blank) value for ZFIABC. When I look into the master data, ZFIXYZ has now two records.
E.g ZFIXYZ  ZFIABC
     111     2
     111     (blank)
     222     3
Apparently, BW creates automatically records in the master data?!
I'm sure that there are no spaces before or after value 111 of ZFIXYZ for InfoPackage B.
Can anybody explain why BW creates this new records 111-(blank) automatically?
How can I avoid this?
Regards,
Pascal

Answer 1

Thanks SB and Riccardo,
ZFIABC is indeed an InfoObject with ZFIXYZ as Compounding.
The complete flow is as follows.
1) Load from flat file to ODS: ZFIABC is not included yet. ZFIABC is only in the InfoCube, not in the ODS. Up to this part, everything goes fine.
2) Load from ODS to IC:
ZFIABC is in the InfoCube and updated via the transfer rules. The transfer rule is an ABAP Code. It takes the value 111 from ZFIXYZ, looks into the master data table of ZFIXYZ and takes the corresponding value 2 for InfoObject ZFIABC.
What is strange, is that the record 111 (ZFIXYZ) - 2 (ZFIABC) is in the master data. But apparently, another line 111 (ZFIXYZ) - (blank) (ZFIABC) is created. So I find the combination 111 - (blank) in my InfoCube.
I hope everything is now clear for you?!
Regards,
Pascal