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Missing RT data



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<FONT color=#000080 
size=2>Tomasz,
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Ver. 4.20.5, 
Esignal RT.
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I havebeen 
collecting RT 1 minute bars on QQQ.  The historical data for 
QQQ started around 5/30/02.  I have some old HTML system 
reports showing QQQ trades dated on 5/30/02.  Just now I am finding 
the QQQ history only goes back to 8/2/02.
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Quite often I do 
receive bad data from Esignal and do a Fixup on QQQ.  Also my Database 
settings, number of bars to load is set to 30,000.
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What would cause 
me to lose early data?  Is the data really missing or is there a limitation 
to how much data Amibroker can load?
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<FONT color=#000080 
size=2>Thanks,
<FONT face="Vladimir Script" color=#000080 
size=5>Rick