The code and the Strategy Log are attached.
The question is:
If the line 31 of the code is correct why does the line 37 (with the same code) throw an exception?

package jforex;

import com.dukascopy.api.IAccount;
import com.dukascopy.api.IBar;
import com.dukascopy.api.IContext;
import com.dukascopy.api.IHistory;
import com.dukascopy.api.IMessage;
import com.dukascopy.api.IStrategy;
import com.dukascopy.api.ITick;
import com.dukascopy.api.Instrument;
import com.dukascopy.api.JFException;
import com.dukascopy.api.OfferSide;
import com.dukascopy.api.Period;
import java.io.PrintStream;
import java.util.EnumSet;
import java.util.concurrent.TimeUnit;

public class JFTestGetBarsOnWeekend implements IStrategy {

    @Override
    public void onStart(IContext context) throws JFException {
        PrintStream out = context.getConsole().getOut();
        IHistory history = context.getHistory();
        Instrument instrument = Instrument.GBPUSD;
        Period period = Period.ONE_MIN;
        context.setSubscribedInstruments(EnumSet.of(instrument), true);
        out.println(context.getSubscribedInstruments());
        long to = history.getBarStart(period, System.currentTimeMillis());
        long from = to - 10 * period.getInterval();

        out.println("#1 " + history.getBars(instrument, period, OfferSide.BID, from, to)); // this line is correct
        try {
            TimeUnit.MINUTES.sleep(1);
        } catch (InterruptedException ex) {
            out.println(ex);
        }
        out.println("#2 " + history.getBars(instrument, period, OfferSide.BID, from, to)); // this line throws exception
        context.stop();
    }

    @Override
    public void onTick(Instrument instrument, ITick tick) throws JFException {}

    @Override
    public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) throws JFException {}

    @Override
    public void onMessage(IMessage message) throws JFException {}

    @Override
    public void onAccount(IAccount account) throws JFException {}

    @Override
    public void onStop() throws JFException {}
}

The question is rather this:
Why does the first line not throwing the exception on a Remote Run, as it does throw it on Local Run?

Interesting.
Let's wait for a Monday morning reply from Support .

We could not reproduce this:

I also had the exception, on the Remote Server, yesterday (Sunday).

I guess the issue is related to the execution time. It replicated the issue at the weekend, and the original poster also.