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AR# 22812

8.1i CORE Generator - ERROR: Error loading L&F: java.lang.NullPointerException


When opening an IP Core customization GUI from Core Generator or from Project Navigator, the following error occurs:

ERROR: Error loading L&F: java.lang.NullPointerException

ERROR: Error loading L&F: java.lang.NullPointerException


at javax.swing.MultiUIDefaults.getUIError(Unknown Source)

at javax.swing.UIDefaults.getUI(Unknown Source)

at javax.swing.UIManager.getUI(Unknown Source)





This error has been seen in JAVA applications on some computers after the Windows desktop theme has bee altered.

Try resetting your windows theme to the default.

1 - Go to Windows desktop, right click, and bring up Properties

2 - Go to Themes tab

3 - Change theme to Windows XP

A similar java.lang.NullPointerException will be issued for other java based applications. See (Xilinx Answer 22813)
AR# 22812
Date Created 03/05/2008
Last Updated 09/07/2011
Status Archive
Type General Article