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something related to X-window?

 
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I'm trying JForum 2.1.4 (with MySQL 5). When I use "register", the following error occurs. My server's running RH Linux and doesn't always use X-window system or even have a monitor(I use SSH to logon the server from my PC). I'm not sure if it is the problem. What should I do?

Caused by: java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:140)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.getFont(RandomFontGenerator.java:496)
at com.octo.captcha.component.image.fontgenerator.TwistedRandomFontGenerator.getFont(TwistedRandomFontGenerator.java:495)
at com.octo.captcha.component.image.fontgenerator.TwistedAndShearedRandomFontGenerator.getFont(TwistedAndShearedRandomFontGenerator.java:494)
at com.octo.captcha.component.image.wordtoimage.ComposedWordToImage.getFont(ComposedWordToImage.java:559)
at com.octo.captcha.component.image.wordtoimage.AbstractWordToImage.getAttributedString(AbstractWordToImage.java:528)
at com.octo.captcha.component.image.wordtoimage.AbstractWordToImage.getImage(AbstractWordToImage.java:512)
at com.octo.captcha.image.gimpy.GimpyFactory.getImageCaptcha(GimpyFactory.java:544)
... 40 more

[originally posted on jforum.net by Anonymous]
 
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Take a look here:

https://coderanch.com/t/575163

Rafael
[originally posted on jforum.net by Rafael Steil]
 
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