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Thank you, Tony.

Do you have any idea about the exact nature of this problem so that it could be fixed in the generator code?

I notice older StdHep files do not have this problem but I have seen it in many files generated for HPS recently (from madgraph I think?).

-----Original Message-----
From: Tony Johnson [mailto:[log in to unmask]] 
Sent: Wednesday, September 30, 2015 8:37 AM
To: McCormick, Jeremy I.; Graf, Norman A.
Cc: Graham, Mathew Thomas; hps-software
Subject: Re: stdhep error

On 09/30/2015 08:18 AM, McCormick, Jeremy I. wrote:


	Hi,
	
	Does anyone have any idea about what causes this error in JAS3 when I try to open StdHep files?
	
	java.io.IOException: Invalid version 
	    at hep.io.mcfio.MCFIOBlock.read(MCFIOBlock.java:40)
	    at hep.io.stdhep.StdhepRecord.read(StdhepRecord.java:24)
	    at hep.io.stdhep.StdhepRunRecord.read(StdhepRunRecord.java:58)
	    at hep.io.mcfio.MCFIOReader$EventHeader.getBlock(MCFIOReader.java:231)
	    at hep.io.stdhep.StdhepReader.nextRecord(StdhepReader.java:49)
	    at org.lcsim.util.loop.StdhepEventSource.next(StdhepEventSource.java:83)
	[snip]
	
	I've opened a bug report for it in our Jira.
	
	https://jira.slac.stanford.edu/browse/HPSJAVA-610
	
	I have not been able to open any of the StdHep files that I have tried recently in JAS3.  I suspect it may have to do with an incompatibility introduced in a recent versions of the Freehep mcfio package, but it is just a guess.
	
	Thanks.
	
	--Jeremy
	

This sounds familiar, I think Norman reported something similar and it was to do with the way the stdhep files were generated. I put a work around in:

http://java.freehep.org/svn/repos/freehep/diff/freehep/trunk/hepio/freehep-mcfio/src/main/java/hep/io/mcfio/MCFIOBlock.java?revision=16295&entries=/freehep/trunk/hepio/freehep-mcfio/src/main/java/hep/io/mcfio/MCFIOBlock.java@16295&entries=/freehep/trunk/hepio/freehep-mcfio/src/main/java/hep/io/mcfio/MCFIOBlock.java@16294

Looks like this is currently only in freehep-stdhep 2.0.6-SNAPSHOT.

Tony

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