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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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: JP Kalb > Email Address: address@hidden > Organization: SJSU > Package Version: 5.0u1 build date:2014-08-08 16:54 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files (x86)\IDV_5.0u1\jre version: 1.7.0_51 > j3d:1.6.0-pre9-daily-experimental daily > Description of problem: Creating display: Color-Filled Contour Plan View > visad.UnitException: visad.UnitException > visad.UnitException > Got this while trying the equation > (850T-500T)+850DP-(700T-700DP) but I had already made it calculate the > dewpoints. > JP, For both tickets, you can try this: (make2D(T850)-make2D(T500))+make2D(DP850)-(make2D(T700)-make2D(DP700)) As the variable T and DP are both 3D, and the IDV will think the result of the formula as 3D and causing the problem. Yuan > ****************** > Stack trace: > visad.UnitException > at visad.RealType.binary(RealType.java:474) > at visad.FunctionType.binary(FunctionType.java:270) > at visad.FunctionType.binary(FunctionType.java:270) > at visad.DataImpl.binary(DataImpl.java:141) > at visad.DataImpl.subtract(DataImpl.java:195) > at visad.DataImpl.__sub__(DataImpl.java:1403) > 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) > at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186) > at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204) > at org.python.core.PyObject.__call__(PyObject.java:404) > at org.python.core.PyObject.__call__(PyObject.java:408) > at org.python.core.PyMethod.__call__(PyMethod.java:124) > at org.python.core.PyMethod.__call__(PyMethod.java:115) > at org.python.core.PyObjectDerived.__sub__(PyObjectDerived.java:187) > at org.python.core.PyObject._basic_sub(PyObject.java:2119) > at org.python.core.PyObject._sub(PyObject.java:2105) > at org.python.pycode._pyx113.kindex$1(<string>:8) > at org.python.pycode._pyx113.call_function(<string>) > at org.python.core.PyTableCode.call(PyTableCode.java:165) > at org.python.core.PyBaseCode.call(PyBaseCode.java:301) > at org.python.core.PyFunction.function___call__(PyFunction.java:376) > at org.python.core.PyFunction.__call__(PyFunction.java:371) > at org.python.core.PyFunction.__call__(PyFunction.java:361) > at org.python.pycode._pyx119.f$0(<string>:1) > at org.python.pycode._pyx119.call_function(<string>) > at org.python.core.PyTableCode.call(PyTableCode.java:165) > at org.python.core.PyCode.call(PyCode.java:18) > at org.python.core.Py.runCode(Py.java:1261) > at org.python.core.__builtin__.eval(__builtin__.java:484) > at org.python.core.__builtin__.eval(__builtin__.java:488) > at org.python.util.PythonInterpreter.eval(PythonInterpreter.java:190) > at ucar.unidata.data.DerivedDataChoice.getData(DerivedDataChoice.java:795) > at ucar.unidata.data.DataChoice.getData(DataChoice.java:637) > at ucar.unidata.data.DataInstance.getData(DataInstance.java:243) > at ucar.unidata.data.DataInstance.getData(DataInstance.java:207) > at ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:206) > at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:163) > at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:144) > at > ucar.unidata.idv.control.GridDisplayControl.doMakeDataInstance(GridDisplayControl.java:299) > at > ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:3278) > at > ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:3234) > at ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:664) > at > ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:195) > at ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:489) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1402) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1085) > 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:1243) > > > Ticket Details =================== Ticket ID: LKP-243429 Department: Support IDV Priority: Normal Status: Closed