Hi,
Please try as below:
*XDIM_MEMBERSET TIME = 2014.JAN
*XDIM_MEMBERSET CATEGORY = ACTUAL
*WHEN CATEGORY
*IS "ACTUAL"
*REC(EXPRESSION = %VALUE%,TIME=TMVL(1,2014.JAN),CATEGORY="FORECAST")
*ENDWHEN
*COMMIT
Hope it works..
For further details on how to script logic please check
Thanks,
Raju