Dear support, I have a problem with following call in stand-alone JForex API when run against historical data (using ITesterClient interface):
indicators.sma(instrument, Period.THIRTY_MINUTES, OfferSide.BID, AppliedPrice.CLOSE, 20, Filter.WEEKENDS, 1000, bidBar.getTime(), 0); for EUR/USD as instrument

(obviously I'd like to get last 1000 values of 30 minutes SMA for EUR/USD)

On log console there is a warning "WARN Indicators - There is not enough data to calculate value for SMA" and an empty array is returned. On the other hand the unchanged piece of code runs fine with live date (IClient interface)

In code for ITesterClient I do have this block of code executed before starting the strategy:
Future<?> future = client.downloadData(null);
Thread.sleep(10000);
future.get();

I'm using a permanent demo account. It seems to me this started since 2.7.2 version of the library. When I compile the unchanged code with version 2.6.69 everything works correctly.

Could you please check if there is an issue with historical data servers or something got changed since 2.7.2 version. Thanks in advance.

Please use the latest JForex-SDK and JForex-API version, see:
viewforum.php?f=113
If the error persists also with the latest version, then please provide full example program and the example strategy which replicates the error.