Re: using jython

• To: "Stephen C. Upton" <upton@xxxxxxxxx>
• Subject: Re: using jython
• From: Tom Whittaker <tomw@xxxxxxxxxxxxx>
• Date: Mon, 30 Jul 2001 16:31:34 -0500

Hi Steve...

On the surface, this sure looks like a classpath problem.  But...it also looks
like you've covered all the bases.  I could simulate the same error condition
by first clearing my CLASSPATH environment variable, and then running your
"Attemp #1" (no explicit pointer to jython.jar).

However, when I ran something like your Attempt #2:

java -cp .;d:\src\visad.jar;d:\java\jython\jython.jar visad.python.JPythonFrame

I got a "normal" start-up of the editor.  Since you've apparently also tried
this setting CLASSPATH in the environment and then just running, "java
visad.python.JPythonFrame", there must be some other problem...

I notice that Curtis made some changes in this area last month, so perhaps you
could test with an earlier version?  I put together a "VisAD pre-packaged for
Windows" file in May, which is found at:
<http://www.ssec.wisc.edu/~tomw/visadtutor/jyvis.exe>

that I'd ask you to download and unpack it into a NEW directory and see if this
works for you. (Sorry it's large - it's a complete JRE/VisAD/Jython/Java3D
collection...).  That will help.

Thanks.

tom


"Stephen C. Upton" wrote:
> 
> I am attempting to run the JPythonEditor as described in the
> jython-visad tutorial under the section entitled "The
> visad.python.JPythonEditor"
> 
> I get these errors when attempting to run from the command line as
> indicated. I haven't peeked at the source yet, just wondering if anyone
> else is having these types of problems (I believe they are very simple
> errors). I have jython.jar in my classpath, and even running with the
> explicit classpath as indicated in #2 below, JPythonFrame is not finding
> the jython stuff. I can run jython from the command line, and I can run
> the visad.python stuff from the jython prompt, e.g., the plot example.
> 
> Attempt #1
> C:\visad>java -cp visad.jar visad.python.JPythonFrame
> visad.VisADException: JPython library not found
>         at visad.python.JPythonEditor.<init>(JPythonEditor.java:114)
>         at visad.python.JPythonFrame.<init>(JPythonFrame.java:43)
>         at visad.python.JPythonFrame.<init>(JPythonFrame.java:38)
>         at visad.python.JPythonFrame.main(JPythonFrame.java:54)
> 
> Attempt #2
> C:\visad>java -cp .;visad.jar;c:\jython-2.0\jython.jar
> visad.python.JPythonFrame
> visad.VisADException: JPython library not found
>         at visad.python.JPythonEditor.<init>(JPythonEditor.java:114)
>         at visad.python.JPythonFrame.<init>(JPythonFrame.java:43)
>         at visad.python.JPythonFrame.<init>(JPythonFrame.java:38)
>         at visad.python.JPythonFrame.main(JPythonFrame.java:54)
> 
> thanx
> steve upton
> 
> BTW, GREAT STUFF!!

-- 
Tom Whittaker (tomw@xxxxxxxxxxxxx)
University of Wisconsin-Madison
Space Science and Engineering Center
Phone/VoiceMail: 608/262-2759
Fax: 608/262-5974

• Follow-Ups:
  • Re: using jython
    • From: Stephen C. Upton

• References:
  • using jython
    • From: Stephen C. Upton