I saw more times this error in Java console, when error occured, deleting changed cache files stops.

......
2015-03-06 15:47:29.561 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2014\00\ASK_candles_hour_1.bi5
2015-03-06 15:47:30.535 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2014\01\BID_candles_hour_1.bi5
2015-03-06 15:47:30.618 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2014\09\ASK_candles_hour_1.bi5
2015-03-06 15:47:30.831 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2013\11\ASK_candles_hour_1.bi5
2015-03-06 15:47:31.041 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2014\09\BID_candles_hour_1.bi5
2015-03-06 15:47:31.221 INFO  d - Deleting changed cache file C:\Users\x\Local Settings\JForex\.cache\ESPIDXEUR\2013\11\BID_candles_hour_1.bi5
2015-03-06 15:47:31.246 ERROR d - Failed to check cache changes 
java.io.EOFException
   at java.io.RandomAccessFile.readUnsignedShort(Unknown Source)
   at java.io.DataInputStream.readUTF(Unknown Source)
   at java.io.RandomAccessFile.readUTF(Unknown Source)
   at com.dukascopy.charts.data.datacache.d.a.b.readUTF(Unknown Source)
   at com.dukascopy.charts.data.datacache.cz.aq(Unknown Source)
   at com.dukascopy.charts.data.datacache.c.d.K(Unknown Source)
   at com.dukascopy.charts.data.datacache.c.d.mE(Unknown Source)
   at com.dukascopy.charts.data.datacache.c.g.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)