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Hi Jimmy- > Full Name: Jimmy Moreno > Email Address: address@hidden > Organization: New Mexico State University > Package Version: 2.5 build date:2008-05-08 07:05 UTC > Operating System: Windows XP > Hardware: Java: home: C:\Program Files\IDV_2.5\jre version: 1.5.0_11 > j3d:1.3.2 fcs (build12) > Description of problem: I have a question regarding an error I received while > trying to use the formula function > in IDV. I have a grid file and I am tring to use a the simple difference > formula in IDV to > create a poind data list of the result. Once I select the proper fields the > program gives me an > error which is detailed below and fails to output any data. I can create the > point list from > an individual field in the grid file but when I attempt to create the plot > list from the simple > difference formula it fails. I would appreciate any help or insight about > this problem. > Thank you very much for you time. Sorry for the confusion. The point list will only work for point data, not grids. It shows up as a valid display for the formula because there are other cases where that might be appropriate. What do you want to do with this list? There might be another way to accomplish this. Don Murray > java.lang.ClassCastException: visad.Real > at > ucar.unidata.idv.control.ObsListControl.makeDisplay(ObsListControl.java:180) > at ucar.unidata.idv.control.ObsListControl.loadData(ObsListControl.java:626) > at ucar.unidata.idv.control.ObsListControl.setData(ObsListControl.java:430) > at ucar.unidata.idv.control.ObsListControl.init(ObsListControl.java:145) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1257) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:968) > at ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:951) > at ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:876) > at ucar.unidata.util.Misc$3.run(Misc.java:1018) > > > ****************** > Stack trace: > java.lang.ClassCastException: visad.Real > at > ucar.unidata.idv.control.ObsListControl.makeDisplay(ObsListControl.java:180) > at ucar.unidata.idv.control.ObsListControl.loadData(ObsListControl.java:626) > at ucar.unidata.idv.control.ObsListControl.setData(ObsListControl.java:430) > at ucar.unidata.idv.control.ObsListControl.init(ObsListControl.java:145) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1257) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:968) > at ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:951) > at ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:876) > at ucar.unidata.util.Misc$3.run(Misc.java:1018) > > > Ticket Details =================== Ticket ID: EUZ-525340 Department: Support IDV Priority: Normal Status: Open