This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
> 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. Nicholas, 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. Yuan > > ****************** > 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