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Print() not working in expert during backtest.


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davidwt 2005.08.26 03:35 
I have Print() statements in my simple expert that successfully print to the experts log while running the expert on a chart. The exact same expert run during a backtest does not print anywhere that I can find (i've searched every file modified by today's date, no log file anywhere contains what should have been printed). This makes for difficult debugging if I cannot print anything during a backtest.
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Shimodax 2005.08.26 11:51 

It should appear in the Journal tab of Back-Tester window, at least my prints do that here.

Markus
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davidwt 2005.08.26 15:36 
I think I figured out when it does and does not print. It will print to the journal log when the optimization is disabled, and will not print when the optimization is enabled.

Maybe that is intentional to prevent huge journal log generation or slowing down the execution. I'm not sure, but its probably not a bug. Hopefully, someone from MQ will confirm this.
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Vooch 2005.08.27 11:11 
I imagine it's to prevent a huge journal log during optimizations.
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Slawa 2005.08.28 01:05 
I imagine it's to prevent a huge journal log during optimizations.

you are right
"Testing Features and Limits in MetaTrader 4" - Special Features of Optimization Process
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davidwt 2005.08.28 01:41 
Thank you, Slawa.

Also, nice page to have for reference.
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bubo 2005.08.29 04:15 
I have a problem with printing as well - it does not even print to the journal during live sessions.

I used the syntax:

Print(variable1, variable2);

as in MT3 before. Does this not work on my computer for MT4 - do I need to do anything else?
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Shimodax 2005.08.29 05:30 

@Bubo

If it's an Indicator or EA running real time it prints to the "Experts" tab of the Terminal pane.



Markus
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bubo 2005.08.30 00:44 

@Bubo

If it's an Indicator or EA running real time it prints to the "Experts" tab of the Terminal pane.

Markus


Oh, it is in 'Experts' in MT4 - not 'Journal' as in MT3. Thank you !!
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Shimodax 2005.08.30 02:37 

You're welcome :-)
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bubo 2005.08.30 20:45 

You're welcome :-)


A related question - does anybody know how to print those results seen in 'Experts' to a file in MT4, for later viewing?
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