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Hi, Could you provide a little more context to this error? What data are you using? What parameters? etc. Jeff > Description of problem: Creating display: Isosurface > org.python.core.PyException > > ****************** > Stack trace: > Traceback (innermost last): > File "<string>", line 1, in ? > at visad.FlatField.setSamples(FlatField.java:709) > > at visad.FlatField.setSamples(FlatField.java:664) > > at visad.FlatField.derivative(FlatField.java:4395) > > at visad.FlatField.derivative(FlatField.java:4485) > > at > ucar.unidata.data.grid.DerivedGridFactory.partial(DerivedGridFactory.java:2223) > > at > ucar.unidata.data.grid.DerivedGridFactory.partial(DerivedGridFactory.java:2196) > > at > ucar.unidata.data.grid.DerivedGridFactory.partial(DerivedGridFactory.java:2165) > > at ucar.unidata.data.grid.DerivedGridFactory.ddy(DerivedGridFactory.java:2147) > > at > ucar.unidata.data.grid.DerivedGridFactory.createRelativeVorticity(DerivedGridFactory.java:303) > > at > ucar.unidata.data.grid.DerivedGridFactory.createAbsoluteVorticity(DerivedGridFactory.java:420) > > 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.FieldException: visad.FieldException: setSamples: bad array length > > > Ticket Details =================== Ticket ID: ANI-818595 Department: Support IDV Priority: Normal Status: Open