Indicator plot randomly disappearing in panel

[Taggart]

Over the last few days a couple of custom indicators that I wrote (which have performed without any problems for months) have been sporadically disappearing in their respective panels. Pressing F5 brings the plots back and they work fine until the next time the plots disappear.

An error message appears in the log: "Error on plotting values to chart data box for indicator 'XXX'. Please check the OnBarUpdate method. Object reference not set to an instance of an object.

I have a try/catch block for everything in OnBarUpdate but I don't get anything in the output window. (Maybe my try/catch is messed up - see attached). It seems to happen in Market Replay a lot more than with a live feed.

try{
BLOCK OF CODE
}catch (Exception e){	Print("XXX Line 212 " + e.ToString());return;	}

Can anyone provide any insight on what might be going on here? I thought it may be a corrupt workspace issue and have completely rebuilt that to no avail. Any other thoughts?

Cheers,
Taggart

[NinjaTrader_Bertrand]

Hi Taggart, so you have the try / catch around individual OnBarUpdate() sections to isolate? Do you use the .Reset method here on any plots? Is the Databox usually opened when this occurs for you in replay?

[Taggart]

Bertrand,

Thanks for getting back to me.

I have one big try/catch for all the code in OnBarUpdate. Is that ok? I'm a hack so I'm not sure. There is no reset method in the code. Yes, the databox is open.

I should also add I just upgraded last night to the most recent version of NT (I was on the one previous) and nothing changed. I have made no other changes to anything in NT.

[NinjaTrader_Bertrand]

Taggart, thanks. Would the same be thrown if no databox was used while you tested?

It would be more efficient to have smaller try / catch statements around code sections in your method, that way you can pinpoint where you run into the exception.

[Taggart]

I'll try closing the databox and see what happens.

[Taggart]

Bertrand,

I have closed the databox and I am unable to reproduce the error. Unfortunately, I really need to use the databox. I have discovered a few things that may narrow down the search. Firstly, I was wrong about the frequency of which the problem occurred in market replay versus live feed. There is no difference. Secondly, the problem exists even if I am disconnected to any feed, which is curious to me as the log file error mentions OnBarUpdate. The OnBarUpdate should not be triggered if I'm not connected to anything, right? I can reproduce the error with regularity (when databox is open) it seems that randomly clicking from chart to chart causes the plot to disappear within the panel after some time.

[ninZa]

Bertrand, this error occurs right below a post when I hit "Thanks" button:

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 55

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 107

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 111

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 119

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 130

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 134

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 142

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 211

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/init.php on line 389

Deprecated: Assigning the return value of new by reference is deprecated in /home/ninja002/public_html/support/forum/includes/class_core.php on line 2552

[NinjaTrader_Bertrand]

Bertrand, this error occurs right below a post when I hit "Thanks" button:

Thanks for the report, we will look into it further.

[NinjaTrader_Bertrand]

Bertrand,

I have closed the databox and I am unable to reproduce the error. Unfortunately, I really need to use the databox. I have discovered a few things that may narrow down the search. Firstly, I was wrong about the frequency of which the problem occurred in market replay versus live feed. There is no difference. Secondly, the problem exists even if I am disconnected to any feed, which is curious to me as the log file error mentions OnBarUpdate. The OnBarUpdate should not be triggered if I'm not connected to anything, right? I can reproduce the error with regularity (when databox is open) it seems that randomly clicking from chart to chart causes the plot to disappear within the panel after some time.

Thanks for the update Taggart, can you please send in your indicator to reproduce on our end to support? OnBarUpdate() would still be triggered even if not connected, you will still process historical bars.

[Taggart]

Ok, where should I send it?

[NinjaTrader_Brandon]

Hello Taggart,

Thanks for your reply.

You can send it to platformsupport[at]ninjatrader[dot]com
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