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[IDV #JME-421608]: Error while trying to plot IPV contour

> Full Name: Nicholas Fenner
> Email Address: address@hidden
> Organization: University of Louisiana at Monroe
> Package Version: 2.8u1 build date:2010-02-02 22:30 UTC
> Operating System: Windows Vista
> Hardware: Java: home: C:\Program Files\IDV_2.8u1\jre version: 1.6.0_17 
> j3d:1.5.2 fcs (build4)
> Description of problem: Creating display: Contour Plan View
> org.python.core.PyException
> I was trying to create a Contour Plan View of Isentropic Potential
> Vorticity from the GFS Conus 80km model data.  Clicking 'Create
> Display' and double clicking the Contour Plan View option both returned
> this error.

      When you create a contour display of Isentropic Potential Vorticity, the 
Python scripts do the calculation of partial theta base on the vertical levels, 
so, you need to select more than one level. For example, if you like to have  
Isentropic Potential Vorticity at 250mb, you can select levels 200mb, 250mb, 
and 300mb. We will also make some changes in the IDV to display a better error 
message in the future.

> ******************
> Stack trace:
> Traceback (innermost last):
> File "<string>", line 1, in ?
> at visad.FlatField.derivative(FlatField.java:4044)
> at visad.FlatField.derivative(FlatField.java:4485)
> at 
> ucar.unidata.data.grid.DerivedGridFactory.partial(DerivedGridFactory.java:2365)
> at 
> ucar.unidata.data.grid.DerivedGridFactory.createIPV(DerivedGridFactory.java:1953)
> at 
> ucar.unidata.data.grid.DerivedGridFactory.createIPV(DerivedGridFactory.java:1879)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> visad.VisADException: visad.VisADException: derivative: d_partial_s not
> in domain or reference

Ticket Details
Ticket ID: JME-421608
Department: Support IDV
Priority: Normal
Status: Closed

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