NT7b18 crashed without reason, complete freezing

[dave1992]

Sorry Jason, you'll have to expand on that - I've no idea which part of my post you're responding to.

[NinjaTrader_Jason]

Sorry about that - it refers to the question below in your last paragraph.

"Can you describe exactly what typical symptoms are on someone's PC when Ninja does this?"

[powermoney]

At no time during the freeze did 'not responding' show in the Ninjatrader control center window or in the windows task manager. The Ninjatrader.exe process continued to run - only the application GUI was frozen in place.

Also, I should mention that during one freeze I left it alone for 1 1/2 hours to see if it would clear itself up and it did not.

[dave1992]

Sorry about that - it refers to the question below in your last paragraph.

"Can you describe exactly what typical symptoms are on someone's PC when Ninja does this?"

Well in that case you've just proved that it's not the performance issue, since in our examples nothing happens - no messages, no 'not responding' message, no slowing down of response, no slowing of the OS, no build up of CPU/mem

Now can you finally take seriously that it's not performance related?

[powermoney]

From a programmer's perspective this almost seems like an endless loop.

Another thing that I noticed was that the memory usage of Ninatrader.exe slowly continued to increase after the freeze of the GUI interface.

[NinjaTrader_Ray]

metaltrade, powermoney, dave1992,

I would like to first see what the common items each of you might share during the locks ups:

- Did you all have NinjaScript strategies running when the freeze occurred?
- Real time or on market replay or both?
- Did you all have working orders open? If yes, Sim or live account?

We did release B19 today and it would be great if you could all upgrade to this version so we know we are testing against the latest code base.

First, thanks for posting your findings here. Second, thanks in advance for working with us on this.

[toddaclark]

I just had NT7-B18 totally lock up on me, even in this "low volatity time frame".

I was on live data at 4:30pm or so EST, I had no open orders and no strategies running. I was just switching between charts in my workspace. There are 14 charts in my workspace. I just switching from one chart to another and NT would hang up for a few seconds before switching. Then I tried to switch to another chart and it hung up for a minute so I opened the windows task manager and watched memory climb from 500k to 1.3k over a period of 5 minutes while NT7 was frozen.

I finally killed it and started over but I don't think that fixed my problem.

Ryan told me to re-create the account connections, re-create all of my workspaces, etc. I'm willing to do all of that but do you think that is really the source of the problem or the solution to whatever is causing the problem. Re-creating all of my workspaces, etc will take over an hour and I don't want to go thru that if it's not really the issue.

Any suggestions would be appreciated.
Thanks,
Todd

[NinjaTrader_Ray]

I just had NT7-B18 totally lock up on me, even in this "low volatity time frame".

I was on live data at 4:30pm or so EST, I had no open orders and no strategies running. I was just switching between charts in my workspace. There are 14 charts in my workspace. I just switching from one chart to another and NT would hang up for a few seconds before switching. Then I tried to switch to another chart and it hung up for a minute so I opened the windows task manager and watched memory climb from 500k to 1.3k over a period of 5 minutes while NT7 was frozen.

I finally killed it and started over but I don't think that fixed my problem.

Ryan told me to re-create the account connections, re-create all of my workspaces, etc. I'm willing to do all of that but do you think that is really the source of the problem or the solution to whatever is causing the problem. Re-creating all of my workspaces, etc will take over an hour and I don't want to go thru that if it's not really the issue.

Any suggestions would be appreciated.
Thanks,
Todd

Todd,
Thanks for reporting. No need to re-create workspaces or account connections at this time. At this time, we have no clue what the root cause would be but hopefully some answers lie in your workspace.

Could you kindly do the following:

- Start NT
- Help > Mail To Support
- Send us workspace, trace and logs
- Please include in this email answers to the questions in my prior post
- Attention to Josh

We will follow up with further questions once we have this initial information and files.

In the meantime, please upgrade to Beta 19 which was released earlier today.

[NinjaTrader_Ray]

metaltrade, powermoney, dave1992,

I would like to first see what the common items each of you might share during the locks ups:

- Did you all have NinjaScript strategies running when the freeze occurred?
- Real time or on market replay or both?
- Did you all have working orders open? If yes, Sim or live account?

We did release B19 today and it would be great if you could all upgrade to this version so we know we are testing against the latest code base.

First, thanks for posting your findings here. Second, thanks in advance for working with us on this.

Info I collected from earlier post:

Dave1992 - Live Trading, B18, Zen-Fire, 5 Running Strategies

[toddaclark]

Ray..

I've sent the email to Josh. I will upgrade to the latest version and wait to here from Josh via email.

I use zenfire. I use windows XP.

Also, I was using the workspace titled "current1-smaller" when I had the issues but I closed that and opened "current1" and NT still seemed to be hanging up.

Thanks,
Todd

[azuul]

I had the same problem yesterday:

NT 7.0.0.18, live trading /IB/ forex: - after about 2 executed trades NT froze completely in place, I could not move any window or disable the strategy, cpu/mem was not an issue.
It was a simple crossover for testing purposes and I remember one strange detail, maybe it is important:
NT was frozen showing a short position, while in TWS I had a long position!
That means NT must have submitted a close + buy order wich arrived in TWS and it froze before /while trying to show the change in the control center. I think it was that way, not the other way round.

I did not encounter this behavior with live data + simulation any time before.

I was using IB datafeed, TWS was behaving fine, no error messages or other general performance issues.

I tried the same thing and it froze again. ( I had only one strategy running the 2nd time and only one datafeed)

Today I tried a different strategy live and no freeze at all.

[toddaclark]

I had the same problem yesterday:

NT 7.0.0.18, live trading /IB/ forex: - after about 2 executed trades NT froze completely in place, I could not move any window or disable the strategy, cpu/mem was not an issue.
It was a simple crossover for testing purposes and I remember one strange detail, maybe it is important:
NT was frozen showing a short position, while in TWS I had a long position!
That means NT must have submitted a close + buy order wich arrived in TWS and it froze before /while trying to show the change in the control center. I think it was that way, not the other way round.

I did not encounter this behavior with live data + simulation any time before.

I was using IB datafeed, TWS was behaving fine, no error messages or other issues.

I tried the same thing and it froze again. ( I had only one strategy running the 2nd time and only one datafeed)

Today I tried a different strategy live and no freeze at all.

What is TWS?

[NinjaTrader_JoshP]

azuul,

Do you still have the log/trace files for the incident you described? Can you please send them into support[at] ninjatrader [dot] com with Attn Josh and a link to this thread? Thank you.

Where were you viewing the short position from? A chart? Positions tab in NT Control Center?

When you say you tried again, does that mean you tried again just now and got it to reproduce? If so, can you send us that particular strategy you are using (the original one that has seen freezing 2x, not the different one that was working)? Also, what version of TWS are you using?

toddaclark,

TWS is IB's Trader's Workstation client that we connect to when people establish IB connections. FYI: I sent you an email with clarification emails needed for your case.

[azuul]

I just sent you the trace and log

I am not 100% sure if I was long or short in TWS, but I am rather sure that the TWS position was the opposite position from what was shown in Ninjatrader control center /strategy tab which I had visible.
I cannot say exactly how/when, but I realized at one point that NT GUI was frozen, I think after the 2nd crossover, and that
the position I had for real was different from what the frozen NT control center showed.
I do not remember if I had "immediatelly submit live working orders" activated or not
that time - if that is of any relevance.
Maybe the discrepancy in positions has other reasons, but it came to my attention and I was wondering about it.
The strategy was running on a 20 seconds bar chart.

I tried it a second time shortly afterwards that day and it happend again.

I did not try to reproduce the same scenario yet, but a different strategy yesterday ran without freezing for a longer time, (1 Minute bars)

The strategy I do not want to send, but it is the same I used on other instruments /timeframes etc. - in live data simulation I never had any freeze of that kind during that time, so the strategy itself does not seem to be the problem. It is not big or complex
There are no print" " statements in it, CalculateOnBarClose = true and traceorders is not activated.

TWS Build 900.6

I hope this helps to determine the source of the problem.
Thanks for your efforts!

[powermoney]

metaltrade, powermoney, dave1992,

I would like to first see what the common items each of you might share during the locks ups:

- Did you all have NinjaScript strategies running when the freeze occurred?
- Real time or on market replay or both?
- Did you all have working orders open? If yes, Sim or live account?

We did release B19 today and it would be great if you could all upgrade to this version so we know we are testing against the latest code base.

First, thanks for posting your findings here. Second, thanks in advance for working with us on this.

Ray,

Strategies were running during the freeze
Real Time
Working orders were open - in Sim