Re: problem with writing netcdf file

Hi tom:

nectdf-3 file format doesnt support "long" type, so NetcdfFileWriteable 
wont accept it.
sorry the error message wasnt more useful.


Tom Whittaker wrote:

> I tried joining the netcdf-java mailing list using the on-line form, 
> but got no results emailed back to me...so I'm writing directly (sorry).
>
> I'm trying to write my very first netcdf file from scratch using 
> netcdf-2.2.jar.  Just as I'm starting, I'm testing and it's throwing 
> an interesting exception.  I'm sure it's "Pilot Error", but I have no 
> clue at this point.
>
> I'm using the current netcdf-2.2.jar file from the web site.
>
> Here's the code (sorry it's in Jython, but that's what we're using 
> these days -- if it turns out to be some data type conversion 
> problems, then I'll have to find a way around that, but when I look at 
> "DataType.LONG" it prints a "long" and is a class ucar.nc2.DataType):
>
> from ucar.nc2 import NetcdfFileWriteable
> from ucar.nc2 import DataType
>
> def makeNetCDFtest():
>
>   ncfile = NetcdfFileWriteable()
>   ncfile.setName("mydata.nc")
>   oneDim = ncfile.addDimension("one",1)
>
>   ncfile.addVariable("date", DataType.LONG, [oneDim,])
>   ncfile.addVariableAttribute("date","long_name","Date, in YYYYMMDD 
> format")
>
>   ncfile.create()
>   ncfile.close()
>
> if __name__ == "__main__":
>   makeNetCDFtest()
>   print "done..."
>
>
> Here's the exception:
>
> raceback (innermost last):
>
>   File "<string>", line 19, in ?
>   File "<string>", line 15, in makeNetCDFtest
>
> java.lang.IllegalStateException: unknown DataType == long
>     at ucar.nc2.N3header.getType(N3header.java:405)
>     at ucar.nc2.N3header.writeVars(N3header.java:586)
>     at ucar.nc2.N3header.create(N3header.java:458)
>     at ucar.nc2.N3iosp.create(N3iosp.java:255)
>     at ucar.nc2.NetcdfFileWriteable.create(NetcdfFileWriteable.java:299)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
>
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
>
>     at java.lang.reflect.Method.invoke(Method.java:324)
>     at 
> org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
>     at org.python.core.PyMethod.__call__(PyMethod.java)
>     at org.python.core.PyObject.__call__(PyObject.java)
>     at org.python.core.PyInstance.invoke(PyInstance.java)
>     at org.python.pycode._pyx79.makeNetCDFtest$1(<string>:15)
>     at org.python.pycode._pyx79.call_function(<string>)
>     at org.python.core.PyTableCode.call(PyTableCode.java)
>     at org.python.core.PyTableCode.call(PyTableCode.java)
>     at org.python.core.PyFunction.__call__(PyFunction.java)
>     at org.python.pycode._pyx79.f$0(<string>:19)
>     at org.python.pycode._pyx79.call_function(<string>)
>     at org.python.core.PyTableCode.call(PyTableCode.java)
>     at org.python.core.PyCode.call(PyCode.java)
>     at org.python.core.Py.runCode(Py.java)
>     at org.python.core.Py.exec(Py.java)
>     at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
>     at org.jext.scripting.python.Run.execute(Unknown Source)
>     at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
>
>     at java.lang.reflect.Method.invoke(Method.java:324)
>     at 
> org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
>     at 
> org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
>     at org.python.core.PyObject.__call__(PyObject.java)
>     at org.python.core.PyObject.invoke(PyObject.java)
>     at org.python.pycode._pyx78.f$0(<string>:3)
>     at org.python.pycode._pyx78.call_function(<string>)
>     at org.python.core.PyTableCode.call(PyTableCode.java)
>     at org.python.core.PyCode.call(PyCode.java)
>     at org.python.core.Py.runCode(Py.java)
>     at org.python.core.Py.exec(Py.java)
>     at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
>     at org.jext.PythonAction.actionPerformed(Unknown Source)
>     at org.gjt.sp.jedit.textarea.InputHandler.executeAction(Unknown 
> Source)
>     at 
> org.gjt.sp.jedit.textarea.DefaultInputHandler.keyPressed(DefaultInputHandler.java:259) 
>
>     at org.gjt.sp.jedit.textarea.JEditTextArea.processKeyEvent(Unknown 
> Source)
>     at java.awt.Component.processEvent(Component.java:4909)
>     at java.awt.Container.processEvent(Container.java:1569)
>     at java.awt.Component.dispatchEventImpl(Component.java:3615)
>     at java.awt.Container.dispatchEventImpl(Container.java:1627)
>     at java.awt.Component.dispatchEvent(Component.java:3477)
>     at 
> java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1713) 
>
>     at 
> java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:627) 
>
>     at 
> java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:831) 
>
>     at 
> java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:741) 
>
>     at 
> java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:592) 
>
>     at java.awt.Component.dispatchEventImpl(Component.java:3506)
>     at java.awt.Container.dispatchEventImpl(Container.java:1627)
>     at java.awt.Window.dispatchEventImpl(Window.java:1606)
>     at java.awt.Component.dispatchEvent(Component.java:3477)
>     at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
>     at 
> java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201) 
>
>     at 
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) 
>
>     at 
> java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
>     at 
> java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
>     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
>
> java.lang.IllegalStateException: java.lang.IllegalStateException: 
> unknown DataType == long