value that is invalid since it's out of range

[mgin98]

http://www.ninjatrader.com/support/forum/showthread.php?t=35191&highlight=accessing+index

Hello

I'm using the very useful Highlow indicator quite extensively and it's generally working well but at times it will freeze and produce the following error message:

"Error on calling 'On Bar Update Method' for Indicator 'Highlow'. You are accessing an index with a value that is invalid since it's out of range, ie accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart."

I have no idea what happens here (there are always more than 5 bars on my charts) and it would be great if this bug could be removed.

When the indicator freezes I remove it manually and reapply it immediately. Sometimes this works and sometimes it freezes again shortly afterwards. When I reapply it a few hours later it always works fine.

Thanks

PS: The code is attached

I'm experiencing the same error although I don't have the freezing issue. It's also a custom high/low indicator of sorts accessing a different timeframe. If I comment out the plot section and simply print the values, they all show in the output window but if I uncomment the plot, I get the error. Below is what I am using:

If (CurrentBar < 1) return;
if (CurrentBars[1] > barsrequired) {
high = Indicator([BarsArray[1], 21).Plot0[1];
low = Indicator([BarsArray[1], 21).Plot1[1];
Plot0.Set(high);
Plot1.Set(low); }

if I substitute the plot statements for
Print(Time[0] + " " + CurrentBars[1] + " high= " + high + " || low= " + low);

The output shows:

11/15/2010 10:32:00 AM 2 high= 1.36223 || low= 1.36223
11/15/2010 10:32:30 AM 3 high= 1.36223 || low= 1.36223
11/15/2010 10:33:00 AM 4 high= 1.36201 || low= 1.36201
11/15/2010 10:33:30 AM 5 high= 1.3619 || low= 1.3619
11/15/2010 10:34:00 AM 6 high= 1.36152 || low= 1.36152
11/15/2010 10:34:30 AM 7 high= 1.36148 || low= 1.36148
11/15/2010 10:35:00 AM 8 high= 1.36133 || low= 1.36133
11/15/2010 10:35:30 AM 9 high= 1.36128 || low= 1.36128
11/15/2010 10:36:00 AM 10 high= 1.3614 || low= 1.3614
11/15/2010 10:36:30 AM 11 high= 1.36117 || low= 1.36117
11/15/2010 10:37:00 AM 12 high= 1.3614 || low= 1.3614
11/15/2010 10:37:30 AM 13 high= 1.3612 || low= 1.3612
11/15/2010 10:38:00 AM 14 high= 1.36136 || low= 1.36136
11/15/2010 10:38:30 AM 15 high= 1.36144 || low= 1.36144
11/15/2010 10:39:00 AM 16 high= 1.36177 || low= 1.36177
11/15/2010 10:39:30 AM 17 high= 1.36162 || low= 1.36162
11/15/2010 10:40:00 AM 18 high= 1.3616 || low= 1.3616
11/15/2010 10:40:30 AM19 high= 1.36154 || low= 1.36109
11/15/2010 10:41:00 AM 20 high= 1.36154 || low= 1.36109
11/15/2010 10:41:30 AM 21 high= 1.36154 || low= 1.36109

The highs/lows will be the same until the 19th bar but the point is that values are there starting at bar 2 and I have barsrequired set at 21.

[NinjaTrader_Bertrand]

Do you have a CurrentBars check for all added series as well and not just for the primary one?

[mgin98]

I only have if (CurrentBars[1] > barsrequired) { do something; } but not a seperate check for CurrentBars[1] < 1 return; if that's what you mean. I threw the indicator together in 10 mnutes and it worked right out of the gate, until I tried to add it to another workstation the next day.

[NinjaTrader_Bertrand]

Yes, that what I had in mind - would you mind attaching the indicator so we could give it a run here? The BarsRequired would be visual for indicators, the unstable period we had as chart property for 6.5

[mgin98]

I found the problem. I only have 1 additional bars object added to the primary chart. I was referencing CurrentBars[1] and BarsArray[1] instead of CurrentBars[0] and BarsArray[1]. I must have made last minute changes last night that broke it at some point but the inconsistency of indexes between currentbars and barsarray didn't help. Thanks anyway.

[NinjaTrader_Bertrand]

Thanks for reporting back and glad to hear you got it working.