Generic data extraction and loading to cube

Question

Hello guys, I am trying to load R3 data thru Gernic extraction to infocube in bw3.5.
I just created generic DS and activated it and also Replicated in BW side.
I am trying to extract transaction data - from FI , DS has Ship Info Table fields in the extraction structure.
Everything got activated and now i am in BW side, just assigned DS to infosource.
But i am stuck in Transfer rules, all infoobjects on the left are empty and it wont let me activate.
I am really confused, Should i be creating infoobjects first , because i havent created infocube yet.
My DS has about 12 fields , I really need someone to tell me why its not activating Transfer rules, Comm structure is still empty.
Should i be creating INfocube first with KF and Chars?or how am i supposed to map these DS fields in the Infocube (my data target)?
I guess i am not clear at this point, even with LO extraction I could get create DS and replicate in BW , but once i am in BW i become clueless i should say.I did search other posts here but couldnt find anything that help me understand this.if someone could explain me in a simple terms i would appreciate it.
I have created DS with extraction structure, i am in BW , so whatever field i selected in extract structure in R3 side f rom the table , is that going to be Chars and Key figures in my Infocube once i complete Loading ? or how would that work? Why would we need to chose specific Table when creating view , assuming that we already know the data that we need for reporting purposes, we would know those data should be on what table correct?
please drop some lines to help me thanks

Answer 1

hello again, i am writing this since i didnt get any response. I would really appreciate it if someone could give me little hint , i have been practicing on my own using bw system and need help from you Pros.
My previous question was regarding Transfer rule . I am still not able to get through that steps.
This is what i have done so far:
-created DS generic for transaction data,  using View VBAK table (not sure if this was the right table, i just wanted to see if i would be successful loading data in the cube).
- ACtivated DS, replicated in BW, Assigned INfosource.
- I selected 15 Fields from DS (extraction structure ) from that VBAK table.
- But when i am in Transfer rule ./structure screen, there are many fields appearing.
- It will let me active the Transfer Rules, however i also created InfoCube , it asked me to chose at least one Time Chars, and KF. But i used Template using my infosource, there were no KFs . so i figured i need to change Transfer rule. I tried to create Key figure infoobject on the right side of the screen in Transfer rules, but it will not move to the right when i tried to transfer it.
My question is, why there are more fields in this screen and some fields are not appearing the one i selected.
Since i chose transaction Generic DS,is that why i have to have Key figures? did i chose worng table VBAK for practice purpose? i dont really see much Keyfigures when i looked the content of this table using SE16.
Guys please suggest me , what route should i take to get through this confusion.
My main objective here is to simply load R3 data using Genric DS(transacitonal)  into a customized infocube.
I get error when creating Update rule, infosource and infocube wouldn not link, i think its becoz i didnt have any keyfigures available when creating Infocube ? how would i chose one?
anyone please throw me some suggestions ..i would really appreciate it.thanks again for reading