Hello Avinash,
update on local defined tables is not supported.
As you loop over a cursor (which causes bad performance) and wanna update the S_FPCA column of each single row with a calculated value only, you can do that calculation already in the query.
lt_temp_tab = select (S_FTCA * 0.014) as S_FPCA, ... other columns ... FROM :I_VIEW;
Regards,
Florian