What are these 2 letters at the beginning of lines?

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Good morning
How are you ?

I'm looking at the terminal log to debug some of my code for data synchronization between the server and the terminal.

Here it is 

IM       0        09 : 57 : 10.990      (GOLD,M1)      History check for GOLD for timeframe M1 
FF       0        09 : 57 : 10.990      (GOLD,M1)      The history for GOLD in M1 was successfully downloaded from 2023.11 . 24 07 : 11 to 2023.11 . 25 10 : 58 
OL       0        09 : 57 : 10.990      (GOLD,M1)      History are synchronized
FJ       0        09 : 57 : 20.655      (GOLD,M5)      History check for GOLD for timeframe M5 
KF       0        09 : 57 : 20.655      (GOLD,M5)      Error 4401 loading historical data for GOLD in M5. Attempt 1 / 5 
NE       0        09 : 57 : 20.655      (GOLD,M5)      Error 4401 loading historical data for GOLD in M5. Attempt 2 / 5 
MD       0        09 : 57 : 20.655      (GOLD,M5)      Error 4401 loading historical data for GOLD in M5. Attempt 3 / 5 
PS       0        09 : 57 : 20.655      (GOLD,M5)      Error 4401 loading historical data for GOLD in M5. Attempt 4 / 5 
OR       0        09 : 57 : 20.655      (GOLD,M5)      Error 4401 loading historical data for GOLD in M5. Attempt 5 / 5 
ES       0        09 : 57 : 20.655      (GOLD,M5)      Unknown error or shutdown requested
HJ       0        09 : 57 : 29.829      (GOLD,M1)      History check for GOLD for timeframe M1 
LE       0        09 : 57 : 29.830      (GOLD,M1)      The history for GOLD in M1 was successfully downloaded from 2023.11 . 24 07 : 11 to 2023.11 . 25 10 : 59 
JM       0        09 : 57 : 29.830      (GOLD,M1)      History are synchronized
KK       0        09 : 57 : 31.304      (GOLD,M5)      History check for GOLD for timeframe M5 
ED       0        09 : 57 : 31.304      (GOLD,M5)      The history for GOLD in M5 was successfully downloaded from 2023.11 . 24 07 : 15 to 2023.11 . 25 11 : 07 
IN       0        09 : 57 : 31.304      (GOLD,M5)      History are synchronized
DH       0        09 : 57 : 56.069      (GOLD,M15)     History check for GOLD for timeframe M15 
QH       0        09 : 57 : 56.069      (GOLD,M15)     Error 4401 loading historical data for GOLD in M15. Attempt 1 / 5 
DF       0        09 : 57 : 56.069      (GOLD,M15)     Error 4401 loading historical data for GOLD in M15. Attempt 2 / 5 
GE       0        09 : 57 : 56.069      (GOLD,M15)     Error 4401 loading historical data for GOLD in M15. Attempt 3 / 5 
RD       0        09 : 57 : 56.069      (GOLD,M15)     Error 4401 loading historical data for GOLD in M15. Attempt 4 / 5 
MS       0        09 : 57 : 56.069      (GOLD,M15)     Error 4401 loading historical data for GOLD in M15. Attempt 5 / 5 
LP       0        09 : 57 : 56.069      (GOLD,M15)     Unknown error or shutdown requested
DJ       0        09 : 57 : 58.908      (GOLD,M5)      History check for GOLD for timeframe M5 
KE       0        09 : 57 : 58.908      (GOLD,M5)      The history for GOLD in M5 was successfully downloaded from 2023.11 . 24 07 : 16 to 2023.11 . 25 11 : 07 
RM       0        09 : 57 : 58.908      (GOLD,M5)      History are synchronized

What are these 2 letters at the beginning of lines?
Is this something that has meaning that could help me understand the logs?
On my example course, not once is the combination represented

THANKS
 
Gerard Willia G J B M Dinh Sy: I'm looking at the terminal log to debug some of my code for data synchronization between the server and the terminal. What are these 2 letters at the beginning of lines? Is this something that has meaning that could help me understand the logs? On my example course, not once is the combination represented

They are internal codes used by MetaTrader. Ignore them. They are of no use to you.

Focus on your issues with the broker connectivity or possible network issues.

This seems to be a MT4 report, not MT5.

 
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THANKS
My question was for metrader 5, it may also be valid for metrader 4 for moving to the right forum
 
Gerard Willia G J B M Dinh Sy #: THANKS. My question was for metrader 5, it may also be valid for metrader 4 for moving to the right forum
Are you sure the example log is from MT5???

MT5 does not have separate history downloads for each time-frame. It only downloads M1 data and then constructs the other time-frames.

The sample log you gave clearly is downloading separate time-frame data.
 

Looking over the log again, I see that maybe I am misreading it, but I still see it mention "downloading".

Anyway, you may have corrupted data files. You may need to clear the files and have MetaTrader 5 re-create them again.

PS! I moved the topic back into a MT5 section, but placed in the EA section this time.

 

D
Yes yes I'm sure it's from metrader 5 :-)
Thanks for moving to the right forum.

it's the terminal log, not the tester

And all the messages are printformats in my codes (a struggle but I'll get it)  

 PrintFormat ("History check  for  %s  for  timeframe %s ", 
i_InpLoadedSymbol, GetPeriodName( i_InpLoadedPeriod));

 PrintFormat ( "The history for %s in %s was successfully downloaded from %s to %s",
p_symbol, i_TimeFrameDisplay, i_StartDateDisplay, i_StopDateDisplay);

 PrintFormat ( "Error %d loading historical data for %s in %s. Attempt %d / %d",
 GetLastError (), p_symbol, i_TimeFrameDisplay, i_Attenpt + 1 , i_AttenptMax);
    
 
Gerard Willia G J B M Dinh Sy #: Yes yes I'm sure it's from metrader 5 :-) Thanks for moving to the right forum. it's the terminal log, not the tester. And all the messages are printformats in my codes (a struggle but I'll get it)  

You should have been more clear that this is from the "Experts" log and not the Terminal log (aka "Journal" log).

Anyway, if you need help with data synchronisation, then you will have to provide example code and explain your issue in detail.

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