Re: FW: Error Calling Java from MATLAB

• To: Rich Signell <rsignell@xxxxxxxx>
• Subject: Re: FW: Error Calling Java from MATLAB
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Mon, 24 Jul 2006 14:44:17 -0600

Hi Rich:

Sorry to take so long, i was on vacation last week.

java.io.IOException: Could not open null
        at 
com.mathworks.toolbox.mbc.units.UnitXML.urlToInputSource(UnitXML.java:547)
        at com.mathworks.toolbox.mbc.units.UnitXML.toXdoc(UnitXML.java:151)
        at com.mathworks.toolbox.mbc.units.UnitXML.getFromXML(UnitXML.java:114)
        at ucar.units.StandardUnitDB.addFromXML(StandardUnitDB.java:173)
        at ucar.units.StandardUnitDB.<init>(StandardUnitDB.java:115)

The source from ncSrc-2.2.16.zip matches the class in toolsUI-2.2.16.jar.

Whoever is debugging should check their classpath; putting toolsUI-2.2.16.jar 
first should get the correct class. If it isnt obvious, add the -verbose option 
to the java command, then grep through the output until you find where the 
ucar.units package is getting loaded, it will look something like:

[Loaded ucar.units.StandardUnitDB from file:/C:/dev/thredds/cdm/target/classes/]

Let me know if I can help further.

PS: I have another user who wants to know how to read netcdf/CF into MatLab. Is 
this a standard feature ? if so, can I point him to some docs? thanks...


Rich Signell wrote:

John,

The Mathworks tech support is trying to debug a problem encountered when
running NetCDF java from inside Matlab.

I gave them

ncSrc-2.2.16.zip  toolsUI-2.2.16.jar

but they say (see message further below):

 >"The developer wanted to debug the StandardsUnitDB.java file, but he
 > believes this file is outdated with the JAR-file as there is no
 > addFromXML function in this file.  Can you verify that you gave us
 > the source code that was used to create the JAR-file?
 >

Can you verify this for them?

Thanks,
Rich


support@xxxxxxxxxxxxx wrote:

[THREAD ID:1-2YEEMP]

Hi Richard,

A couple of days ago I sent you a reply requesting some additional
information to help us resolve the problem you reported. Since I have
not yet heard back from you, I am not sure whether you received my
e-mail or whether you still need assistance.  I am forwarding the
e-mail that I sent in case you did not previously receive it.

If you still need assistance, please let me know.

Thank you, Mark

Mark Jones Application Support Engineer The MathWorks, Inc. http://www.mathworks.com/support File Exchange:

http://www.mathworks.com/matlabcentral/ Phone: (508) 647-7000



-----Original Message-----

From:  US Support Profile Sent:  2006-07-18 01:53:52 PM To:
rsignell@xxxxxxxx Subject:  Error Calling Java from MATLAB

[THREAD ID: 1-2X4VUM]

Hi Richard,

The developer wanted to debug the StandardsUnitDB.java file, but he
believes this file is outdated with the JAR-file as there is no
addFromXML function in this file.  Can you verify that you gave us
the source code that was used to create the JAR-file?

Thanks,

Mark