When I try to execute the below procudure

DECLARE 
   v_user                    VARCHAR2 ( 10 ) := '1404046813' ; 
   v_pass                  VARCHAR2 ( 250 ) ; 
   v_remain                NUMBER ; 
   v_check                    VARCHAR2 ( 250 ); 
   p_nas_identifier      VARCHAR2 ( 100 ); 
   p_nas_port           	VARCHAR2 ( 100 ); 
   p_pswd               	VARCHAR2 ( 100 ); 
   p_con_sess         	NUMBER ; 
   p_ip                      VARCHAR2 ( 50 ) ; --:= '62.150.197.162'    ;  --  '62.150.100.42'    ;   -- put hotspot or wireless ip                      if wireless put  ip 
   p_con_typ              VARCHAR2 ( 100 ) ; --:=  'Wireless-IEEE-802-11' ;   --- 	if wireless put   connection type 
   p_up_band               	NUMBER ; 
   p_down_band               	NUMBER ; 	
   p_stat_ip           	VARCHAR2 ( 50 ); 
   p_framed_ip      VARCHAR2 ( 150 ); 
   p_framed_ip2      VARCHAR2 ( 150 ); 	
   v_start_time        VARCHAR2 ( 50 ) := TO_CHAR (SYSTIMESTAMP, 'DD/MM/YYYY HH24:MI:SS.FF5' ); 
   v_end_time       	VARCHAR2 ( 50 ); 
   v_diff                            VARCHAR2 ( 50 ); 
BEGIN 
   DBMS_OUTPUT.PUT_LINE (CHR( 10 ) || '------------------------Start Time : ' ||v_start_time|| ' -------------------------' || CHR( 10 )); 
   Aaa . Is_Active_test (   v_user , v_pass  , v_check , v_remain , p_nas_identifier , p_nas_port , v_pass , p_con_sess , p_con_typ , p_ip , p_down_band , p_up_band , p_stat_ip , p_framed_ip , p_framed_ip2 , 0 ); 
   DBMS_OUTPUT.PUT_LINE (CHR( 10 ) || 'Username: ' ||v_user|| ', OUT :' ||v_pass || ' - check:' ||v_check|| ' - remain:' ||v_remain|| ' Up Band: ' ||p_up_band|| ' Down Band: ' ||p_down_band|| ' Stat IP: ' || p_stat_ip|| ' Framed_ip:' ||p_framed_ip|| CHR( 10 )); 
   v_end_time    := TO_CHAR (SYSTIMESTAMP, 'DD/MM/YYYY HH24:MI:SS.FF5' ); 
   --v_diff    := TO_NUMBER(SUBSTR(v_end_time,-6)) - TO_NUMBER(SUBSTR(v_start_time,-6)) ; 
   v_diff    := SUBSTR (TO_TIMESTAMP( v_end_time , 'DD/MM/YYYY HH24:MI:SS.FF5' ) - TO_TIMESTAMP( v_start_time , 'DD/MM/YYYY HH24:MI:SS.FF5' ) ,- 12 ); 
   DBMS_OUTPUT.PUT_LINE ( '-----------------End Time : ' ||v_end_time|| ' -- Response time : ' ||  v_diff   || ' Sec' || CHR( 10 ));     	
END ; 

Toad gives me the following error:
ORA-24813: cannot send or receive an unsupported LOB

Kindly update me regarding the below code issue