Hi Gita,
Its your selection screen length that is causing the problem. I have modified your code. Please try the code below:
SELECTION-SCREEN BEGIN OF BLOCK param WITH FRAME TITLE frame.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 1(10) scr_pnam FOR FIELD lv_name.
PARAMETERS: lv_name TYPE SPFPFLPAR-PARNAME DEFAULT 'rdisp/btctime'.
SELECTION-SCREEN COMMENT 60(10) scr_pval FOR FIELD lv_value.
PARAMETERS: lv_value TYPE spfpflpar-pvalue VALUE CHECK OBLIGATORY.
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN END OF BLOCK param.
INITIALIZATION.
frame = 'プロファイルパラメータ更新'.
scr_pnam = 'パラメータ名'.
scr_pval = 'パラメータ値'.
Thanks,
Naveen