Thanks Brendon for the help . I agree . I understand that SAP has changed the standard program-SAPSRRK0 in 7.4.
The field symbol <G_SX_RR> was replaced by the attribute p_r_sx_rr of
class CL_RSR_RRK0_DATA_PKG_FILLER in 7.4.
Now the issue is do I replace <G_SX_RR> with p_r_sx_rr in the assign code & things will start working okay or is there some other way out.