Hi Senthil,
"I don't want to create a new record." - new record WILL be created!!! You COPY data! After copy you can clear original record...
If you want to copy data to some dimension member that is defined in the property of some current dimension member then use:
*REC(EXPRESSION=%VALUE%, FSLINE=SOME_DIMENSION.FS_LINEITEM)
Hope it's clear!
Vadim