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April 2022

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Subject:
Problems running tutorial in manual
From:
Jonathan M West <[log in to unmask]>
Reply To:
MASON Multiagent Simulation Toolkit <[log in to unmask]>
Date:
Fri, 29 Apr 2022 03:20:15 +0000
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I keep getting this error message for StudentswithUI.java as implemented in the manual

Exception in thread "main" java.lang.ExceptionInInitializerError
              at myMasonTest.StudentsWithUI.main(StudentsWithUI.java:17)
Caused by: java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null
              at java.desktop/javax.swing.ImageIcon.<init>(ImageIcon.java:234)
              at sim.display.Console.iconFor(Console.java:173)
              at sim.display.Console.<clinit>(Console.java:176)
              ... 1 more

I've searched all over for a solution to this and haven't found one in the listserv, it is obviously a configuration problem but I do not know what is incorrectly configured

Jon West

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