Using a property in *WHEN *ENDWHEN

Question

Dear Experts,
I trying to perform a copy in a script logic from some cost centers to another cost centers.
To do this, the cost center dimension has a property DESTCC which indicates to which cost center must be copied.
For instance, I have de following master data
ID--EVDESCRIPTION----DESTCC
C01--plant--
D01
C02--office--
D01
C03--Commercial--
D02
D01----
Department 1
D02----
Department 2
My first script was
*SELEC(%CC%,ID,COSTCENTER,DESTCC<'>"")
*XDIM_MEMBERSET COSTCENTER=%CC%
*WHEN COSTCENTER
*IS *
*REC(EXPRESSION=%VALUE%,COSTCENTER=[COSTCENTER].DESTCC)
*ENDWHEN
It works fine but it overwrites D01 value got from C01 with the value got from C02.
So I trying to do the sum the previous value for D01
*SELEC(%CC%,ID,COSTCENTER,DESTCC<'>"")
*XDIM_MEMBERSET COSTCENTER=%CC%
*WHEN COSTCENTER
*IS *
*REC(EXPRESSION=%VALUE%+([COSTCENTER].DESTCC),COSTCENTER=[COSTCENTER].DESTCC)
*ENDWHEN
But it does not validate it.
I would appreciate if you could say me how this could be achieved.
Thanks in advance

Answer 1

Thanks for yours answers,
I tried the following code:
*XDIM_MEMBERSET COSTCENTER=%CC%
*WHEN COSTCENTER
*IS *
*REC(EXPRESSION=%VALUE%,COSTCENTER=[COSTCENTER].DESTCC)
*ENDWHEN
But C01 values is overwrite by the C02 in my example.
ID--EVDESCRIPTION--DESTCC----VALUE
C01--plant--
D01   -
100
C02--office--
D01 -
200
C03--CommercialD02--
300
D01----
Department 1
D02----
Department 2
I got the following values:
Cost center   Value
D01----
200
D02----
300
The value for D01 must be 300 (100 + 200) but C02 value overwrite C01 Value for D01
So I want to sum the value from C01 or C02  with the previous value of D01 in order to aggregate it (first it save 100 and then it save 100 + 200).
For this purpose I wrote for rec instruction:
*REC(EXPRESSION=%VALUE%+([COSTCENTER].DESTCC),COSTCENTER=[COSTCENTER].DESTCC)
But it did not validate. I would like to ask you how can this be achivied.
Thanks for your help