[IDV #DIZ-849299]: NullPointerException adding two different fields

Paul,

Yes, please try again tomorrow. I think you tried before our nightly builds 
ran. They run between 2 and 3 AM Mountain Daylight time.

Please keep us up-to-date on your progress.

Best Wishes,

Unidata IDV Support

> Hi Unidata Support,
> 
> Thanks for your update on this issue.  I downloaded the last nightly
> release but it must still not have been updated as I tried the contour plan
> view and experienced the same error.  However, I noticed the colour shaded
> plan view works.  I'll try again tomorrow.
> 
> Thanks again for your help.
> 
> Regards,
> 
> Paul
> 
> 
> On 4 September 2013 05:28, Unidata IDV Support <address@hidden
> > wrote:
> 
> > Paul,
> >
> > Thanks for sending us the data file. As far as we can tell, this bug only
> > manifests itself when displaying the formula as "Contour Plan View". If you
> > choose another display option, say Color-Shaded Plan View, then you should
> > be able to display your data without that error message.
> >
> > For the contour plan view, we did indeed find a minor bug here. Please
> > download the nightly version of the IDV
> > http://www.unidata.ucar.edu/downloads/idv/nightly/index.jsp tomorrow and
> > give it a try. You may have to play around with the contour settings to get
> > a display you are happy with.
> >
> > Please keep us up-to-date on your progress.
> >
> > Best Wishes,
> >
> > Unidata IDV Support
> >
> > > Dear IDV Support,
> > >
> > > Thanks for your reply regarding the IDV error I encountered when
> > attempting
> > > to add two different 4d fields together.  I have uploaded a sample grib2
> > > data file which I was using when the error occurred.
> > >
> > > I have been working on a field for tornado prediction and was
> > experimenting
> > > with adding two different fields, such as CAPE and Storm Relative
> > Helicity,
> > > together when the NullPointerException occurred in the following simple
> > > Jython function:
> > >
> > > def addFields(F1,F2):
> > > return add(noUnit(F1),noUnit(F2))
> > >
> > > I hope the file I uploaded my assist you in finding the cause of this
> > error.
> > >
> > >
> > > Thanks for your help.
> > >
> > > Regards,
> > >
> > > Paul
> > >
> > >
> > > On 31 August 2013 03:05, Unidata IDV Support
> > > <address@hidden>wrote:
> > >
> > > > Paul,
> > > >
> > > > I belatedly read the "Adding two different 4d grids" thread on the IDV
> > > > Users list.
> > > >
> > > > I have been using your formula to add 4D fields that physically do not
> > > > make sense (e.g., geopotential height and relative humidity) without
> > > > problems in the IDV. The IDV/Jython seem to be handling the unit
> > > > incompatibility without problems for the fields I am experimenting
> > with.
> > > > Again, specific examples of what you are trying to achieve may be
> > helpful.
> > > >
> > > > Best,
> > > >
> > > > Unidata IDV Support
> > > >
> > > >
> > > > > Paul,
> > > > >
> > > > > I tried your formula and was able to make it work in my scenario so
> > we
> > > > are going to have to find out a bit more about what you are trying to
> > > > achieve. Where is the data coming from? What fields are you trying to
> > add?
> > > > You can upload a data file for us to examine at
> > > > http://motherlode.ucar.edu/repository/alias/idvupload.
> > > > >
> > > > > Best Wishes,
> > > > >
> > > > > Unidata IDV Support
> > > > >
> > > > >
> > > > > > Full Name: Paul Graham
> > > > > > Email Address: address@hidden
> > > > > > Organization: Weathersim
> > > > > > Package Version: 4.0u1 build date:2013-03-29 18:10 UTC
> > > > > > Operating System: Mac OS X
> > > > > > Hardware: Java: home:
> > > > /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
> > version:
> > > > 1.6.0_51 j3d:1.5.2 fcs (build4)
> > > > > > Description of problem:
> > > > > >
> > > > > > When attempting to add two different fields in IDV using the
> > following
> > > > > > simple Jython method:
> > > > > >
> > > > > > def simpleAdd(F1,F2):
> > > > > > res = add(noUnit(F1),noUnit(F2))
> > > > > > return res
> > > > > >
> > > > > > The following error occurs:
> > > > > >
> > > > > > "Making the widget component
> > > > > > java.lang.NullPointerException"
> > > > > >
> > > > > >
> > > > > >
> > > > > > ******************
> > > > > > Stack trace:
> > > > > > java.lang.NullPointerException
> > > > > > at
> > > >
> > ucar.unidata.idv.control.GridDisplayControl.getDataRangeInColorUnits(GridDisplayControl.java:264)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.GridDisplayControl.getInitialRange(GridDisplayControl.java:233)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.getRange(DisplayControlImpl.java:10001)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.getRangeForColorTable(DisplayControlImpl.java:10029)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.getControlWidgets(DisplayControlImpl.java:7588)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.PlanViewControl.getControlWidgets(PlanViewControl.java:1543)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.ContourPlanViewControl.getControlWidgets(ContourPlanViewControl.java:218)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.doMakeWidgetComponent(DisplayControlImpl.java:7483)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.PlanViewControl.doMakeContents(PlanViewControl.java:1498)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.doMakeWindow(DisplayControlImpl.java:4266)
> > > > > > at
> > > >
> > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1141)
> > > > > > at
> > > >
> > ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:986)
> > > > > > at
> > ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:911)
> > > > > > at ucar.unidata.util.Misc$3.run(Misc.java:1249)
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > > Ticket Details
> > > > ===================
> > > > Ticket ID: DIZ-849299
> > > > Department: Support IDV
> > > > Priority: Normal
> > > > Status: Open
> > > >
> > > >
> > >
> > >
> > > --
> > > Paul Graham
> > > Email: address@hidden
> > > Mobile: 0403003784
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: DIZ-849299
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> >
> 
> 
> --
> Paul Graham
> Email: address@hidden
> Mobile: 0403003784
> 
> 


Ticket Details
===================
Ticket ID: DIZ-849299
Department: Support IDV
Priority: Normal
Status: Closed