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NPE in thread "FirstTickOnWeekends"
[bofriis]
 Post subject: NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Mon 14 Mar, 2011, 23:39 

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When i'm running my own strategy (started from main()), during weekends I
get the following error:

Exception in thread "FirstTickOnWeekends" java.lang.NullPointerException
at com.dukascopy.api.impl.connect.JForexTaskManager.a(Unknown Source)
at com.dukascopy.api.impl.connect.DCClientImpl.a(Unknown Source)
at com.dukascopy.api.impl.connect.l.run(Unknown Source)

How can I avoid this error so my program starts?
 
API Support
 Post subject: Re: JFOREX-2864 NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Thu 27 Oct, 2011, 08:16 
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"When i'm running my own strategy (started from main()), during weekends I
get the following error: "

Do you try to launch it on weekends?
On weekends, we have no ticks and there is no trading at all, that is why this exception rises.
 
trottel
 Post subject: Re: JFOREX-2864 NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Sun 06 Nov, 2011, 18:39 

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API Support wrote:
"When i'm running my own strategy (started from main()), during weekends I
get the following error: "

Do you try to launch it on weekends?
On weekends, we have no ticks and there is no trading at all, that is why this exception rises.


So, should I start my strategy exactly at the time when market opens?

And why ISystemListener().onDisconnect() isn't called in this case?

I'm trying to find the way to run my strategy around the clock.
 
API Support
 Post subject: Re: NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Mon 07 Nov, 2011, 09:18 
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trottel wrote:
So, should I start my strategy exactly at the time when market opens?
To be more precise - over weekends there are no ticks and bars that arrive are flat (O = H = L = C = 0 and Volume = 0) and your orders will be rejected on submission. It is unknown what assumptions were made by the user that he received an NPE, normally you should be able to run/back-test your strategy over weekends. If you want to trade over particular periods, see the following example: https://www.dukascopy.com/wiki/index.php ... ding_hours
 
lux_interior
 Post subject: Re: NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Sun 08 Apr, 2012, 21:54 
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Can that exception in FirstTickOnWeekends be safely ignored?

I would like to start my strategy earlier on Sunday and then just leave it ready for the market to open. Is that possible?
 
API Support
 Post subject: Re: NPE in thread "FirstTickOnWeekends" Post rating: 0   New post Posted: Wed 11 Apr, 2012, 09:19 
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It can not be "ignored" since the exception prevents the strategy from starting when the market is closed. Consider calling IClient.startStrategy right when the market opens.
 
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