[amibroker] Call AFL plugin fuctions,why got "Variable used without having been initialized"

["b853104" <m8931612@xxxxxxxxxxxxxxxxxxx>]

Dear all¡G

I test a AFL plugin example from ADK.  The fuction plugin implement the fuction VExampleMACD()¡A

AmiVar VExampleMACD( int NumArgs, AmiVar *ArgsTable )
{
	// First you need to fill-in
	// arguments table.
	//
	// we will call back MACD that gets two float
	// arguments:
	
	AmiVar arg[ 2 ];
		
	arg[ 0 ].type = VAR_FLOAT;
	arg[ 0 ].val = 12;

	arg[ 1 ].type = VAR_FLOAT;
	arg[ 1 ].val = 26;

	
	// Now you can call internal AFL function
	// using CallFunction callback pointer of the site interface
	// Please note that NO ERROR checking is done
	// on number/types of arguments passed
	// Specifying wrong args here ends with access violation in most cases
         AmiVar result = gSite.CallFunction( "macd", 2, arg );
	return result;
}

FunctionTag gFunctionTable[] = {
								"ExampleMACD",		{ VExampleMACD, 0, 0, 0, 0, NULL }, 
								"ExampleMA",        { VExampleMA, 1, 0, 1, 0, NULL }, 
								"ExampleEMA",        { VExampleMA, 1, 0, 1, 0, NULL } 
};


But when I call the fuction ExampleMACD() from AFL,aynone can tell me why AB report errors?

'm1' Variable used without having been initialized"
'm1' Variable used without having been initialized"

r1 = Param( "Fast avg", 12, 2, 200, 1 );
r2 = Param( "Slow avg", 26, 2, 200, 1 );
r3 = Param( "Signal avg", 9, 2, 200, 1 );
m1 = ExampleMACD();
Plot( ml, StrFormat(_SECTION_NAME()+"(%g,%g)", r1, r2), ParamColor("MACD color", colorRed ), ParamStyle("MACD style") );
Plot( sl = Signal(r1,r2,r3), "Signal" + _PARAM_VALUES(), ParamColor("Signal color", colorBlue ), ParamStyle("Signal style") );
Plot( ml-sl, "MACD Histogram", ParamColor("Histogram color", colorBlack ), styleNoTitle | ParamStyle("Histogram style", styleHistogram | styleNoLabel, maskHistogram ) );



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