Whenever I run the Walk Forward optimization with the Aggregate box ticked, I always get the error "Unhandled exception: Object reference not set to an instance of an object". The analysis always runs through to the last iteration, then I get that error, then NT crashes. It doesn't matter what strategy I use, it even happens with the default SMA crossover strategy.
Please help. Doing this manually is a very slow process.
Thanks.
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