WeBWorK Problems

Library Browser Java Console errors

Library Browser Java Console errors

by Ron Vaillancourt -
Number of replies: 1

Hi, I'm logged into Webwork Course Admin under the following:


Sel. Name Status
RonSet1 now open, due 07/05/2007 at 09:04am EDT

I click on RonSet1 and then the Library Browser under the main menu.

and then the View Problems button:

Library Browser

Add problems to Target Set: Select a Set from this CourseRonSet1

Local Problems: Select a Problem Collectionset0setDemosetMAAtutorial
 Display Mode: plainTextimagesjsMathLaTeXMathMLNone Max. Shown: 5101520253050All

2 pictures come up as a blank white box with a red x in the upper left cornor.

I click on the red X and the Java Console shows the following errors:

java.lang.ClassFormatError: Incompatible magic value 1013478509 in class file Image_and_Cursor

load: class PolarApplet/PolarApplet.class not found.
java.lang.ClassNotFoundException: PolarApplet.PolarApplet.class

Does anyone have a fix for this ?

Should I even worry about this since I'm using "Local Problems: Setdemo0"?

Thanks in advance

In reply to Ron Vaillancourt

Re: Library Browser Java Console errors

by Michael Gage -
Basically you don't need to worry about this. It means that that particular problem isn't working -- in this case it almost certainly has a bad link to the java applet that is being called.

This was one of the first problems written used to show the capabilities of java applets and that java applet at The John Hopkins has moved locations over the last 8 years. :-)

You may have to edit your problem to get the correct link:
 	<APPLET CODE="PolarApplet/PolarApplet.class" WIDTH="250" HEIGHT="350"
CODEBASE="http://www.mat.jhu.edu/~jrm/vander/stable/"> <param name=tmin value="0"> <param name=tmax value="2*pi"> <param name=showcoords value="yes"> <param name=showcoords value="yes"> <param name=settrange value="no"> </APPLET>

Hope this helps.