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Forum: Analysis
Re: None xml vs hbook ??? (a.ayan)
Date: 17 May, 2004
From: <>

> Hi all,
> I have a running code that writes out an ntuple file in xml format. 
> It works fine and creates an ntuple file with the following line
> --------------------------------------------------------------
> --------------------------
> ITreeFactory* treeFactory = analysisFactory->createTreeFactory();
>  if(treeFactory)  tree = 
> treeFactory->create("test.aida","xml",false,true,"compress=yes");
> --------------------------------------------------------------
> ------------------------
> I would like to be able read it with  paw so decided to write 
> it as hbook file and my understanding from the examples is 
> that all I have to change
> -------------------------------------------------------
>  if(treeFactory) tree = 
> treeFactory->create("test.hbk","hbook",false,true);
> ------------------------------------------------------
> However code runs just fine w/o ant problem but does not 
> write/create any ntuple file at all !?? Could anyone tell me 
> what am I missing here?

HI, assuming that you are using JAIDA as your AIDA implementation then the problem is that right now we only support reading hbook files, not writing them. There is no terribly good reason for this, we just assumed people would want to read old paw files, but not create new ones. We could add support if there is sufficient demand (and I have seen several such requests on this list).

I am somewhat surprised that you do not get an error when you call tree->commit() -- perhaps you are using an old version of JAIDA?


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