Strategy Analyzer error

[astrolobe]

I get this error when I run the my strategy in Strategy Analyzer, but I do not get the error when I run the strategy normally with live data.

28/01/2010 12:08:00 PM System.NullReferenceException: Object reference not set to an instance of an object.
at NinjaTrader.Strategy.gcCurrencyRange.get_Now()
at NinjaTrader.Strategy.gcCurrencyRange.CheckExcluded Periods()
at NinjaTrader.Strategy.gcCurrencyRange.OnBarUpdate()

I believe from the error description that the offending code is what I have inserted below.

//******************
private DateTime Now
//******************
{
get { return (Bars.MarketData.Connection.Options.Provider == Cbi.Provider.Replay ? Bars.MarketData.Connection.Now : Historical? Time[0]:DateTime.Now); }
}

Have any of the NT classes in my code above changed in version 7? I could not find anything listed in the "Code-Breaking changes for NT7"

thanks

[NinjaTrader_Ray]

Likely when you call this property, one of the properrties is of course null. There could be changes that we have made between 6.5 and 7 in this unsupported area. You would have to add some null reference checks in your "getter".