Dukascopy Support Board • View topic - JFOREX-2253 : JFException: Instrument [...] not opened in v2.5.1

[quantisan]

I just upgraded my JForex platform to 2.5.1. When I start my contest strategy I am getting the following JFException. I am connected to the server.

02:28:20 Strategy "quantisan2" is stopped at 2010-09-23 02:28:20.749 GMT on the local computer
02:28:20 ---Stopped---
02:28:20 Stopping "quantisan2" strategy at 2010-09-23 02:28:20.748 GMT on the local computer
02:28:20 com.dukascopy.api.JFException: Instrument [EUR/USD] not opened @ jforex.quantisan2.onStart(quantisan2.java:392)
02:28:20 --- Started class jforex.quantisan2 v.2.18 ---[EUR/USD] ---
02:28:20 Strategy "quantisan2" is started at 2010-09-23 02:28:20.746 GMT on the local computer
02:28:20 Starting "quantisan2" strategy at 2010-09-23 02:28:20.739 GMT on the local computer

[Phantal]

I'm sorry if this seems like a 'no duh, I checked that' answer ... but I'll throw it out anyway just in case.

Are you sure you registered to get EUR/USD?

-Brian

[quantisan]

yes, it's listed as one of my instruments in the workspace

the strategy has been working before the 2.5.1 upgrade. I've been running it for September.

[quantisan]

I am still having the same problem in 2.5.2.

The problem seems to be that my strategy is calling for IHistory in onStart(). You can try it with my August contest strategy as it's receiving the same JFException.

nicofr0707

I have the same problem to by calling in onStart()

ITick lastTick = history.getLastTick(currentInstrument);

API Support

Thanks, this is registered, will be fixed ASAP.

[serialgeorge]

Same problem here. The strategy works now in JForex Client, but it cannot be started via API (using the provided singlejartest.Main class). Please update the API ASAP as well.

Another suggestion: on page https://www.dukascopy.com/swiss/english/forex/jforex/library/ you should display the version number of the downloadable JForex Library. There's only a big "Download" link now, so we have to download the JForexClientLibrary.zip file and check it's contest to see the version number ... not too straightforward.

tspeicher

add this code in the onStart() method and add the instruments that you want to use:

       Set<Instrument> set = context.getSubscribedInstruments();       
       set.add(Instrument.EURUSD);
       context.setSubscribedInstruments(set);

MoneyMechanics

thanks for the quick fix, been running into this error as well

edit://doesn't seem like the quick fix is working...I'm getting:
null: java.lang.UnsupportedOperationException
at java.util.Collections$UnmodifiableCollection.add(Collections.java:1018)

API Support

Try this:

Quote:

Set<Instrument> set = new HashSet<Instrument>(context.getSubscribedInstruments());
set.add(Instrument.EURUSD);
context.setSubscribedInstruments(set);