Hello,

I recently start getting this Exception. What could be the cause? I already deleted all the cache file.

16:47:57 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.01 00:00:00 000],expected candle time [2013.11.09 05:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [10750] @ jforex.Strategy1.onTick(Stratergy1.java:1246)

Hi,

It is much easier to investigate if you show the line that caused the exception.
It is even better if you provide the complete strategy that causes the issue. If that is confidential, at least show some part of the strategy.

Hi,

Line 1246: @Override
Line 1247: public void onTick(Instrument instrument, ITick tick) throws JFException {

The code inside onTick method:

       for (IStrategy strategy : strategies) {
          strategy.onTick(instrument, tick);
        }

Normally if a strategy from strategies would throw an exception the error line would be (Stratergy1.java:1249).

Does the problem persist after cleaning the data cache?

Yes,

I deleted all the cache files last weekend. I deleted over 5GB of cache files.
I just checked the cache folder and again it's over 5GB.
Is it normal that the cache folder uses so much space?

It depends how many instruments you normally use and over what periods you do back-test. Say you back-test over 5 years on EUR/USD, assuming that there is one tick per second there will be at least 10 million ticks over that period. Assume you use 9 more instruments in a similar way - there will 100 million ticks in your cache.

Ok,

However I still haven't got any suggestions on what the problem could be, that causes the corrupt data cache file.

I never did a back-test on the PC that is running the strategy. I only use 5 instruments.

23:14:23 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.01 20:00:00 000],expected candle time [2013.11.14 05:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [750] @ jforex.Strategy.onTick(Strategy.java:1246)
On 2013-11-27
14:36:26 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.08 09:00:00 000],expected candle time [2013.11.07 23:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [4425] @ jforex.Strategy.onTick(Strategy.java:1246)
On 2013-11-28
14:36:26 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.07 23:00:00 000],expected candle time [2013.11.07 06:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [4425] @ jforex.Strategy.onTick(Strategy.java:1249)
On 2013-11-28
08:50:01 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.08 09:00:00 000],expected candle time [2013.11.07 23:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [4425] @ jforex.Strategy.onTick(Strategy.java:1246)
On 2013-11-29
10:01:32 com.dukascopy.charts.data.datacache.DataCacheException: Data cache file corrupted, candle time [2013.11.01 10:00:00 000],expected candle time [2013.11.17 23:00:00 000], file [C:\Users\User\Local Settings\JForex\.cache\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5], position in file [500] @ jforex.Strategy.onTick(Strategy.java:1246)
On 2013-11-29

These are the errors I got this week. They only occur on "\EURUSD\intraperiod\2013_11_01_00_ASK_candles_hour_1.bi5", same strategy is running on 4 other Instruments without these errors.

Please provide an example strategy which replicates the case. Please provide a print-screen of you Historical Tester settings.