RequestHistory returns empty bars

[dirt]

My sample here explains my problem, but essentially I'm calling requesthistory for the past 14 days and only the most recent bar gets returned.

I'm stuck, any help is appreciated.

Do I need to call a release method or something?

I've written the appversion just to give a little info.

[AChan]

You can take a look at frmHistory.frm of our Desktop API sample in VB.

http://share.esignal.com/download.jsp?groupid=185&folder=&file=DESKTOP_VB_Sample.zip

To correctly process the returned historical bars, you need to
start from -x and increment to 0 where x is the number of historical bars returned.

Code Snippet in VB:

Public Sub ProcessHistory(historyHandle As Long)

Dim lNumBars As Long
Dim j As Integer
Dim baritem As IESignal.BarData

'Find out how many bars were returned
lNumBars = esignal.GetNumBars(historyHandle)

'Set the above number to its inverse for a decremented loop
lNumBars = lNumBars * -1

For j = lNumBars + 1 To 0

'Retrieve the BarData data structure
baritem = esignal.GetBar(historyHandle, j)

'Parse through the structure and assign its values to variables
vOpen = baritem.dOpen
vHigh = baritem.dHigh
vLow = baritem.dLow
vClose = baritem.dClose
dDate = Format(baritem.dtTime, "general date")

'Build string and display it
sBar = Format$(dDate) & vbTab & "Open=" & Format$(vOpen) & vbTab & "High=" & Format$(vHigh) & vbTab & "Low=" & Format$(vLow) & vbTab & "Close=" & Format$(vClose)
List1.AddItem (sBar)

Next j

'The history handle must be released after use. Note that
'in some cases, ReleaseAllHistory may also be used.
esignal.ReleaseHistory (historyHandle)

End Sub

[dirt]

Ah...negative to zero

I shoulda figured that one on my own.

Thank you.

[grnmtn]

My code is pretty much exactly like your sample code Achan and I still have problems with my history calls. Sometimes it works sometimes it doesn't. One symbol will work another symbol won't. The history calls will work for two weeks then won't pull back data all of a sudden. Frustrating as hell to get it solid

[AChan]

Are you requesting historical bars for one symbol at a time? Try to fire another request only after all data has been collected for the first symbol.

What are the exact arguments you are passing to RequestHistory method?

[grnmtn]

Yes I loop through the symbols so it only makes one call at a time. It's just strange because it works for the Natural Gas Strips (ex. NGSA A0 - 3 month strip) but not for Crude Oil (ex. CLSA A0). Both on Nymex. Same Code different symbols

Attached is the source

thanks for the reply

[AChan]

I was able to download daily bars for the two symbols you listed below. From your code, I don't see that you implemented the event handler for historical bars. Can you confirm that you have implemented
eSignal_OnBarsReceived?

You can try to run our VB Sample (DESKTOP_VB_SAMPLE.zip) at

http://share.esignal.com/groupcontents.jsp?folder=&groupid=185