Object reference

[pman777]

Hi, I'm writing an indicator that adds a higher level 'min' bars to my lower level tick chart. I'm getting this error message (Error on calling 'OnBarUpdate' method for indicator 'MyBackgroundHAHMA' on bar 0: Object reference not set to an instance of an object) but I cannot determine why ... below is the code that is generating this message. any insight would be appreciated; thanks

protected override void OnBarUpdate()
{
// if(CurrentBar < 2)return; //Make sure there are at least 2 bars printed before processin

Print(" ");
Print(instName + " MyBackgroundHAHMA: " + Time[0].ToString());
Print(instName + " BarsInProgress: " + BarsInProgress);

if (BarsInProgress == 1) // process Min Chart
{
if (CurrentBar == 0)
{
HA_C.Set(Close[0]);
HA_O.Set(Open[0]);
HA2_C.Set(Close[0]);
HA2_O.Set(Open[0]);
return;
}
// HA Thma (yellow)
HA2_O.Set((((Open[1] + High[1] + Low[1] + Close[1]) / 4) + HA2_O[1]) / 2);
HA2_C.Set((((Open[0] + High[0] + Low[0] + Close[0]) / 4) + HA2_O[0] + Math.Max(High[0], HA2_O[0]) + Math.Min(Low[0], HA2_O[0])) / 4);
MyHeiken = (3 * hma1[0] - 3 * hma2[0] + hma3[0]);

// Price Thma (red)
MyThma = (3 * hma1t[0] - 3 * hma2t[0] + hma3t[0]);
}



if (BarsInProgress == 0) // process current instrument
{
Print(instName + " MyThma: " + MyThma + " MyHeiken: " + MyHeiken);
if (MyThma >= MyHeiken) BackColorSeries[0] = risingColor;
else BackColorSeries[0] = fallingColor;
}

[NinjaTrader_AdamP]

pman,

I see you commented this out :

// if(CurrentBar < 2)return; //Make sure there are at least 2 bars printed before processin

I would suggest keeping it or rearranging your code here.

if ( CurrentBar < 1 )
{
return;
}
else if (CurrentBar == 1 )
{
HA_C.Set(Close[0]);
HA_O.Set(Open[0]);
HA2_C.Set(Close[0]);
HA2_O.Set(Open[0]);
return;
}
else
{
//everything else
}

[pman777]

tx ... when I uncomment that section, I get this message:

Error on calling 'OnBarUpdate' method for indicator 'MyBackgroundHAHMA' on bar 2: Object reference not set to an instance of an object.

[NinjaTrader_AdamP]

pman,

This looks like a separate issue perhaps.

I would suggest using a Try/Catch here. These can print out what line is causing the issue to the output window.

http://www.ninjatrader.com/support/forum/showthread.php?t=9825

[pman777]

ok ...did that ... tx. Isolated the problem down to this statement:

HA2_O.Set((((Open[1] + High[1] + Low[1] + Close[1]) / 4) + HA2_O[1]) / 2);

Error message: 10/26/2012 12:15:00 AM System.NullReferenceException: Object reference not set to an instance of an object.
at NinjaTrader.Indicator.MyBackgroundHAHMA.OnBarUpdat e()
Error on calling 'OnBarUpdate' method for indicator 'MyBackgroundHAHMA' on bar 2: Object reference not set to an instance of an object.

[NinjaTrader_AdamP]

pman,

It could be this doesn't exist yet : HA2_O[1]

You may want to do this :

if ( CurrentBar < 1 )
{
return;
}
else if (CurrentBar <= 2 )
{
HA_C.Set(Close[0]);
HA_O.Set(Open[0]);
HA2_C.Set(Close[0]);
HA2_O.Set(Open[0]);
return;
}
else
{
//everything else
}

[koganam]

Hi, I'm writing an indicator that adds a higher level 'min' bars to my lower level tick chart. I'm getting this error message (Error on calling 'OnBarUpdate' method for indicator 'MyBackgroundHAHMA' on bar 0: Object reference not set to an instance of an object) but I cannot determine why ... below is the code that is generating this message. any insight would be appreciated; thanks

protected override void OnBarUpdate()
{
// if(CurrentBar < 2)return; //Make sure there are at least 2 bars printed before processin

Print(" ");
Print(instName + " MyBackgroundHAHMA: " + Time[0].ToString());
Print(instName + " BarsInProgress: " + BarsInProgress);

if (BarsInProgress == 1) // process Min Chart
{
if (CurrentBar == 0)
{
HA_C.Set(Close[0]);
HA_O.Set(Open[0]);
HA2_C.Set(Close[0]);
HA2_O.Set(Open[0]);
return;
}
// HA Thma (yellow)
HA2_O.Set((((Open[1] + High[1] + Low[1] + Close[1]) / 4) + HA2_O[1]) / 2);
HA2_C.Set((((Open[0] + High[0] + Low[0] + Close[0]) / 4) + HA2_O[0] + Math.Max(High[0], HA2_O[0]) + Math.Min(Low[0], HA2_O[0])) / 4);
MyHeiken = (3 * hma1[0] - 3 * hma2[0] + hma3[0]);

// Price Thma (red)
MyThma = (3 * hma1t[0] - 3 * hma2t[0] + hma3t[0]);
}



if (BarsInProgress == 0) // process current instrument
{
Print(instName + " MyThma: " + MyThma + " MyHeiken: " + MyHeiken);
if (MyThma >= MyHeiken) BackColorSeries[0] = risingColor;
else BackColorSeries[0] = fallingColor;
}

You have a multi timeframe setup. You need to check for CurrentBar validity on both barSeries.

[pman777]

will try ... thanks!