Hi Markus,

Thanks! I don't know which frame had the CDELT1 = NAN tag (and also do not know how this can happen), Like you suggested, if CDELT1=NAN, I would try using CDELT2, and if this fails as well, use CDELT1=0.6 as the default for all AIA channels as they should all be scaled to this value (0.6 arcsec per pixel) anyway.

Thanks a lot,
Daniel




-------------------------------------------------------------
Dr. Daniel Mueller (<email address hidden>)
Solar Orbiter/SOHO Deputy Project Scientist
ESA/ESTEC (SRE-SM)
P.O. Box 299, 2200 AG Noordwijk, NL
Tel: +31 71 565 4033, Fax: +31 71 565 4697
-------------------------------------------------------------

On 24. 11.2010, at 10:41 , Markus Langenberg wrote:

> The exception was thrown during the this line
> (HelioviewerMetaData.java:134):
> 
> double arcsecPerPixelX = metaDataContainer.tryGetDouble("CDELT1");
> 
> The request to read the value "CDELT1" from the meta data returned "NAN"
> instead of a floating point value, which was not expected and thus
> caused the crash. From my point of view, this value is invalid and
> should not appear in the meta data, thus, the corrupt meta data should
> be corrected. Or is it really intended to get a "NAN"? Then I need to
> know which value should be assumed by JHV, because NaN obviously won't
> do the job here... As one idea: If CDELT1 is NaN and CDELT2 is not, the
> later one can be used. But I don't know, if this was the case here,
> because I don't know the exact time stamp of the corrupted frame.
> 
> ** Changed in: jhelioviewer
>     Assignee: (unassigned) => Markus Langenberg (markus-langenberg)
> 
> ** Changed in: jhelioviewer
>       Status: New => In Progress
> 
> -- 
> [JHV 2.1] Uncaught exception when loading long AIA series
> https://bugs.launchpad.net/bugs/680827
> You received this bug notification because you are a member of
> JHelioviewer Developers, which is subscribed to JHelioviewer.
> 
> Status in JHelioviewer - JPEG2000 Visualization Software: In Progress
> 
> Bug description:
> Hi,
> 
> I just loaded a 500-frame AIA 171 series (2010/08/01-2010/11/21, 6h cadence) and got the exception below. Once, JHV remained functional, but the image data was not updated any more, i.e. I could not play the series and needed to reload it. The second time, JHV displayed the same exception and the quit abruptly shortly thereafter!
> 
> 
> Uncaught Exception detected.
> 
> JHelioviewer Version: 2.1.0
> 
> JHelioviewer Revision: 359
> 
> Date: Wed Nov 24 08:48:35 GMT 2010
> 
> Thread: Thread[J2KRender,6,J2KRenderGroup]
> 
> Message: For input string: "NAN"
> 
> Stacktrace:
> java.lang.NumberFormatException
> at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1224)
> at java.lang.Double.parseDouble(Double.java:510)
> at org.helioviewer.viewmodel.view.jp2view.JP2Image.tryGetDouble(JP2Image.java:591)
> at org.helioviewer.viewmodel.metadata.HelioviewerMetaData.updatePixelParameters(HelioviewerMetaData.java:134)
> at org.helioviewer.viewmodel.metadata.HelioviewerMetaData.checkForModifications(HelioviewerMetaData.java:295)
> at org.helioviewer.viewmodel.view.jp2view.J2KRender.renderLayer(J2KRender.java:233)
> at org.helioviewer.viewmodel.view.jp2view.J2KRender.run(J2KRender.java:351)
> at java.lang.Thread.run(Thread.java:680)
> 
>