Volume Histogram for Amibroker (AFL)

hi
in line 21 and line 22
There’s a mistake
( Warning 505.)
(Warning 501.)
if somebady can help me

hi
https://3.top4top.net/p_12751w8c41.png

hi
https://3.top4top.net/p_12751w8c41.pngbq.

Owied ,Leave that error msg. It is working perfectly

Thank for you
If I Leaved this error ,It is not working

Here the correction

//Volume Bar Chart Version V.1.0 -5-05-2016
// AFL by Karthik Marar 
// Details at www.karthikmarar.blogspot.com
//=========================================================================|
//                    Volume Bar Chart                                     |
//=========================================================================|

_SECTION_BEGIN("Volume Bar Chart");
SetChartOptions(0,chartShowArrows|chartShowDates);
SetChartOptions(0,chartShowArrows|chartShowDates);
Title = ("Marar Volume Histogram - " + Name()+"  " + Date() +"  "+Interval(2) +"  "+ EncodeColor(colorLime)+",Open "+Open +" ,High "+H+" ,Low "+L+" ,Close "+C+" "+"{{VALUES}}");
Vlp=Param("Volume lookback period",150,20,300,10);
SetChartOptions(0,chartShowArrows|chartShowDates);
DTL=Param("Linear regression period",60,10,100,10); 
Vlp=Param("Volume lookback period",30,20,300,10);
Vrg=MA(V,Vlp);// average volume
rg=(H-L);
arg=Wilders(rg,30);
Vh=V>Ref(V,-1) AND Ref(V,-1)>Ref(V,-2);
Cloc=C-L;
x=(H-L)/Cloc;
x1=IIf(Cloc==0,arg,x);
Vb=V>Vrg OR V>Ref(V,-1);
ucls=x1<2;
dcls=x1>2;
mcls=x1<2.2 AND x1>1.8 ;
Vlcls=x1>4;
Vhcls=x1<1.35;
j=MA(C,5);
TLL=LinRegSlope(j,40) ;
Tlm=LinRegSlope(j,10) ;
tls=LinRegSlope(j,3);
upbar=C>Ref(C,-1); 
dnbar=C<Ref(C,-1); 
CloseUp =  C>Ref(C,-1);
Closedn =  C<Ref(C,-1);
VolUp   =  V>Ref(V,-1);
VolDn   =  V<Ref(V,-1);
bb1 = upbar AND CloseUp AND ucls AND L>Ref(L,-1);
bb2 = upbar AND VolUp;
bb3 = dnbar AND CloseDn AND VolDn;
bb4 = dnbar AND CloseDn AND C>Ref(L,-1);
db1 = dnbar AND CloseDn AND dcls;
db2 = dnbar AND VolUp  ;
db3 = upbar AND CloseDn AND VolUp;
db4 = upbar AND CloseDn AND C<Ref(L,-1) AND dcls;
db5 = upbar AND CloseUp AND ucls AND L<Ref(L,-1);
db6 = upbar AND CloseUp AND dcls;
bb=(bb1 OR bb2 OR bb3 OR bb4);
db=(db1 OR db2 OR db3 OR db4 OR db5 OR db6);
Plot(Vrg,"average volume",colorYellow,32|styleThick);
Plot(WMA(V,150),"Long term average",colorOrange,32|styleThick);
GraphXSpace = 5;
GraphXSpace = 5;
SetBarFillColor( IIf(bb AND tls>0, colorGreen,IIf(db AND tls<0,colorDarkRed,colorWhite)) ); 
PlotOHLC(0,V,0,V,"price",IIf(bb AND tls>0, colorLime,IIf(db AND tls<0,colorRed,colorGrey50)), styleCandle ) ;
Plot(Vrg,"average volume",colorYellow,32|styleThick);
PlotOHLC( Vrg,  Vrg,  0, 0, "", 31,styleCloud ); 

Hi,
hmurti
Here the correction
Thank for you
but The same problem is not solved