NT7b18 crashed without reason, complete freezing

[metaltrade]

Yesterday, while I was in a trade on a live account NT crashed without error message, it just froze it was completely unresponsive. I was planning another trade. CTRL-ALT-DEL took me out of it. When I restarted NT and loaded up the charts I was in loss because I needed to enter the market.

I can email the log file but I have no clue if it will say anything since it was a complete freeze, I wasn't doing anything, not clicking anything, just staring at charts since several minutes.

This Ninjatrader experience is getting very expensive for me.

[xTrader1]

There is always a reason for a crash,

But we don't know about. Sometimes developers don't know either.

More seriously, live trading is not recommended on Beta.

[metaltrade]

Yeah I tried 6.5 that even crashed more when I loaded up my 9 charts

[xTrader1]

7 is a big leap forward over 6.5

And I'm sure eventually they will get a stable application. From my point of view it's worth to wait.

[NinjaTrader_Jason]

Hello metaltrade,

Sorry to hear about the issue.

Can you please send me your log and trace files for the date the issue occurred. You can find log and trace files at the following locations.

Start Menu--> My Documents--> NinjaTrader 7--> Log--> log.20100720 for today. (log.yyyymmdd for any other date)

Start Menu--> My Documents--> NinjaTrader 7--> Trace--> trace.20100720 for today. (trace.yyyymmdd for any other date)

At the time of the crash, did you receive an error message or did NinjaTrader just became unresponsive without an error?

You can send your log and trace files to support[at]ninjatrader[dot]com. Please reference this forum thread and put 'Attn Jason' in the subject header.

[powermoney]

Yesterday, while I was in a trade on a live account NT crashed without error message, it just froze it was completely unresponsive. I was planning another trade. CTRL-ALT-DEL took me out of it. When I restarted NT and loaded up the charts I was in loss because I needed to enter the market.

I can email the log file but I have no clue if it will say anything since it was a complete freeze, I wasn't doing anything, not clicking anything, just staring at charts since several minutes.

This Ninjatrader experience is getting very expensive for me.

I have had the same freezing issues as described above - though trading in simulation (SIM101)

[NinjaTrader_Jason]

Hello powermoney,

Can you please tell me if you received an error message or did NinjaTrader just became unresponsive without an error when you experienced the issue?

If you received an error that stated to send us your trace file, can you please send me your trace file.

Start Menu--> My Documents--> NinjaTrader 7--> Trace--> trace.20100722 for today. (trace.yyyymmdd for any other date)

You can send your trace file to support[at]ninjatrader[dot]com. Please reference this forum thread and put 'Attn Jason' in the subject header.

[dave1992]

It happened to me as well, today, with two live trades on. No errors. No clues in the log/trace. Beta 18, Mirus/Zen. 5 strategies running.

[NinjaTrader_Jason]

If you experience freezing/unresponsiveness without error, you will need to reduce data/resource request to avoid it and improve performance.

Check if you are running workspaces in the background (these will request data & resources as well) and close them. Please restart NinjaTrader and go to File-->Workspaces and check what workspaces are listed below 'Save Workspace As'. The workspace with the checkmark is the workspace opened on your monitor. Any additional workspaces listed, are opened in the background. Select a workspace without a checkmark and subsequently go to File-->Workspaces-->Close Workspace. Repeat this process until only one workspace is opened.

Close some charts, SuperDOM's or other NinjaTrader windows. Reduce the amount of indicators in your chart or set 'Calculate on bar close' to True. Or reduce the amount of historical data in your charts by configuring the Format Data Series window.

More tips can be found at the following link.

http://www.ninjatrader.com/support/helpGuides/nt7/performance_tips2.htm

[dave1992]

I'm sorry but you use the CPU/mem/resources argument ad nauseum and as far as I can tell in 98% of cases it just doesn't hold water.

[NinjaTrader_Jason]

Hello dave1992,

Market volatility plays a role as well, so the same setup runs fine most of the time. However when there is increased volatility, you experience lagging/freezing behavior.

If you experience such behavior without any error or other clues, it usually means your NinjaTrader setup requested too much memory/CPU frm your PC.

Did you notice anything else when you experienced the freezing behavior? If you restart NinjaTrader and use the same setup, does the issue persist once connected to your data feed?

[powermoney]

I agree with dave1992. During normal operation and during the freeze, I observed Ninjatrader.exe process using no more than 5% cpu .... and the overall CPU usage was low. The machine running Ninja has 8 processors w/ average 20% usage and no memory issues.

[NinjaTrader_Jason]

Ok, can you please check if you can reproduce this behavior. Do you notice any similarities between the occurences so far?

If so, please send me your workspaces, so I can test the same setup on my end.

[dave1992]

Jason,

You'll find more info in this thread http://www.ninjatrader.com/support/f...ad.php?t=31291

Not every hang is reproducible and there are other ways to investigate and fix this.

Market volatility plays a role as well, so the same setup runs fine most of the time. However when there is increased volatility, you experience lagging/freezing behavior.

This is almost certainly not market volatility. If it was, the following things would likely be true:

1. It doesn't tend to happen through the night, during low volatility
2. It is fairly easy to reproduce at exactly the same time during market replay

If you experience such behavior without any error or other clues, it usually means your NinjaTrader setup requested too much memory/CPU frm your PC.

What evidence do you have for that assertion? In probably more than 90% of cases I have seen on this forum, there has been no evidence for this. Can you describe exactly what typical symptoms are on someone's PC when Ninja does this? Too much memory/cpu implies that the PC is running out of resources. There would be other evidence. But there isn't. Everyone describes it exactly the same. Ninja just stops responding entirely - no other clues - and has to be killed by the OS.

[NinjaTrader_Jason]

NinjaTrader can become unresponsive to any action you try to perform. Or it does respond to actions, but in a delayed manner.

You can see 'not responding' in the Control Center header.