Error: Failed to execute DB job... have tried suggestions in the forum

[OregonSun]

Hello, when automating strategies from a chart with live data on Sim101, I am seeing the following message:

Failed to execute DB job 'StrategyUpdateJob': There was an error
generating the XML document.: NinjaTrader.Strategy.[whateverstrategy]+Q
is inaccessible due to its protection level. Only public types can be
processed.

I am on NT 6.5.1000.7, .NET 3.0, Vista SP1.

The error does not occur when configuring the same strategies from the Strategies tab.

I have done Reset DB, Repair DB, Reset sims, etc. per forum suggestions and the error still occurs.

The line in the log shows the above error message. The proceeding line is:
Starting NinjaScript strategy 'AtomicTest6/705f8fc8d64e4d2fb35c7c761e7edfa6' : On starting a real-time strategy - StrategySync=WaitUntilFlat EntryHandling=AllEntries EntriesPerDirection=1 StopTargetHandling=PerEntryExecution ErrorHandling=StopStrategyCancelOrdersClosePositio ns ExitOnClose=True/ triggering 30 before close Set order quantity by=Strategy

Any additional advice?

Thanks,

OregonSun

[NinjaTrader_Jason]

Hello OregonSun,

I suggest to rename the database and check if the error persists upon initiating the strategy from the chart.

Close NinjaTrader and go to My Documents-->NinjaTrader 6.5-->db and rename the "NinjaTrader.mdb" file to 'OldNinjaTrader.mdb".

Start NinjaTrader and a new database is created automatically. Check if the error persists.

[NinjaTrader_Dierk]

>> Failed to execute DB job 'StrategyUpdateJob': There was an error
generating the XML document.: NinjaTrader.Strategy.whateverstrategy]+Q is inaccessible due to its protection level. Only public types can be
processed.

I vaguely recall that this is an issue related to marking your custom coded strategy properties as private/public/internal etc. I suggest inspecting your custom coded properties. You should not see this issue on wizard generated strategies.

[OregonSun]

DB error apparently fixed!

Ok, I renamed the db, but the problem persisted. Dierk's comment did give the me the clue I needed. My strategy properties were defined as the wizard does them, however, the issue was a struct, which is not by default serializable.

So, the solution was to add the XmlInclude attribute at the beginning of the strategy's public class definition, like so:

[XmlInclude(typeof(MyStruct))]
[Description("Enter the description of your strategy here")]
public class MyStrategy : Strategy

This link has a good description of the use of XmlInclude.

http://www.dalepreston.com/Blog/2005/02/returning-custom-classes-from-web.html

Thanks Jason and Dierk.

[NinjaTrader_Dierk]

Glad you got it resolved.