Cost center retraction from BPS to R/3

Question

Hi All,
I am trying to build a prototype model to check the functionality of cost center planning between SEM and R/3. We are trying to substitute the planning process from R/3 to BW.
I am using standard cost center cube 0cca_c11 and switching between basic and transactional cubes. I have created planning function and set all the retraction parameters..
BUSI I_BUSI
CASE I_CASE
DELTA DEL_BOOK
MAPP KCD_REPID
RFC_DEST RFCDEST
TEST TEST_X
ZARE I_COAR
ZELM I_CELM
ZTYP I_CTYP
In the parameter group i have set the delta process
Retr. R/3 Comp. 6
Retractor Control 4
Delta Update 0
Sender str. Initially blank and later ZCOSTPLAN1
Destination XXXXX
Test 0 (Update)
Controlling Area 01
Cost Element 02
CElem Category 03
When i executed the parameter group initially with no sender structure, i get a log message that x records were read, 0 changed and 0generated.
I created sender structure assigning UPB_RET_COPS as retraction target and referring the dictionary structure UPB_RET_COPS. When i tried to execute i keep getting error messages, i keep getting error message mapping could not be executed, sender structure not suitable for planning
area defined.
I am new to SEM and i would like to have some feedback. Do i need a sender structure if i would not like to do manipulation during extraction or if i need to have a sender structure how i should create my structure and make the values updated in R/3.
Without the sender structure assigned i get success messages in the log ie 12 read 0 changed and 0 generated. With sender structure assigned i keep getting error messages.
Your help is appreciated.
Thanks

Answer 1

Sorry, I missed to add a my observation that when execute the Planning function with some values in selection of either CRM element or WBS element, it is running fine. However when both are left balnk in the selections it is giving me this error. To handle this case, do we need any thing to transfer characteristics with unassigned values '#' ?
Cheers,
Ramz