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Hi Jeremy,

For the online data, there are probably going to be other event types as well, probably something like "scalar" events. Serguei may be able to tell us if there are any others, especially if there are other event types that the monitoring app needs to be aware of.

Best,
	Maurik

On Oct 24, 2013, at 3:49 PM, "McCormick, Jeremy I." <[log in to unmask]> wrote:

> Hi, Serguei.
> 
> Yes, I think that's true.  I rearranged some of the code for reading different events types in the monitoring application (not checked in yet), as what was there didn't make much sense.  That seemed to make this problem go away, and I can see the prestart and go events being handled correctly now.  I think maybe these non-physics events were being treated as physics events before.  I'll let you know if the problem crops up again.  
> Thanks!
> 
> --Jeremy
> 
> -----Original Message-----
> From: Serguei Boiarinov [mailto:[log in to unmask]] 
> Sent: Thursday, October 24, 2013 5:42 AM
> To: McCormick, Jeremy I.
> Cc: hps-software; Serguei Boiarinov
> Subject: Re: null EVIO events in test run data
> 
> Is it 'prestart' and 'go' events ?
> 
> ----- Original Message -----
> From: Jeremy I. McCormick <[log in to unmask]>
> To: hps-software <[log in to unmask]>
> Sent: Thu, 24 Oct 2013 04:38:44 -0400 (EDT)
> Subject: null EVIO events in test run data
> 
> Hi,
> 
> Iím back to doing some work on the monitoring app, and Iím seeing something strange...  
> 
> I have noticed that in the EVIO files for the test run, there are always a few events in the beginning of the run for which the EvioReader returns a null EvioEvent without throwing any kind of error.  Since this class is a complete black box to me, I wonder if anyone can tell me why this might be happening?  Does the problem sound familiar?
> 
> It seems I can simply skip over these problematic events without any adverse effects, but ideally this situation should result in an exception being thrown.  I would like to be able to pre-check events for characteristics that will cause this problem and discard them if this is going to happen, but right now I canít tell what exactly is going wrong.  
> 
> For now, Iíll just have the app print a message to the log table.
> 
> Thanks.
> 
> óJeremy
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