Hi Folks,
I'm trying using ANTRL Works 1.1.7 on Ubunbtu Linuz with Sun's JDK
1.5.0_15; when launching ANTRL Works, a message appears:

java -jar antlrworks-1.1.7.jar
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb1921767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb19218b1]
#2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb19631bd]
#3 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a58dce]
#4 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a42d77]
#5 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a42ef3]
#6 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x26)
[0xb1a43136]
#7 [0xb261bbfa]
#8 [0xb2615b3b]
#9 [0xb2615b3b]
#10 [0xb2613219]
#11 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77c32bc]
#12 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb78d7ed8]
#13 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77c30ef]
#14 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x32d)
[0xb7820b9d]
#15 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d)
[0xb75c730d]
#16 [0xb261b4ab]
#17 [0xb2615a64]
#18 [0xb2613219]
#19 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77c32bc]
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb1921767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb192181e]
#2 /usr/lib/libX11.so.6 [0xb1962518]
#3 /usr/lib/libX11.so.6(XGetVisualInfo+0x26) [0xb19590a6]
#4 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a420b9]
#5 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a42303]
#6 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a42fa1]
#7 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x26)
[0xb1a43136]
#8 [0xb261bbfa]
#9 [0xb2615b3b]
#10 [0xb2615b3b]
#11 [0xb2613219]
#12 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77c32bc]
#13 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb78d7ed8]
#14 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77c30ef]
#15 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x32d)
[0xb7820b9d]
#16 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d)
[0xb75c730d]
#17 [0xb261b4ab]
#18 [0xb2615a64]
#19 [0xb2613219]
[EMAIL PROTECTED]:~/downloads$
[EMAIL PROTECTED]:~/downloads$
[EMAIL PROTECTED]:~/downloads$
[EMAIL PROTECTED]:~/downloads$ java -jar antlrworks-1.1.7.jar
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb1908767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb19088b1]
#2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb194a1bd]
#3 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a3fdce]
#4 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a29d77]
#5 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a29ef3]
#6 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x26)
[0xb1a2a136]
#7 [0xb2602bfa]
#8 [0xb25fcb3b]
#9 [0xb25fcb3b]
#10 [0xb25fa219]
#11 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77aa2bc]
#12 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb78beed8]
#13 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77aa0ef]
#14 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x32d)
[0xb7807b9d]
#15 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d)
[0xb75ae30d]
#16 [0xb26024ab]
#17 [0xb25fca64]
#18 [0xb25fa219]
#19 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77aa2bc]
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb1908767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb190881e]
#2 /usr/lib/libX11.so.6 [0xb1949518]
#3 /usr/lib/libX11.so.6(XGetVisualInfo+0x26) [0xb19400a6]
#4 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a290b9]
#5 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a29303]
#6 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so [0xb1a29fa1]
#7 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x26)
[0xb1a2a136]
#8 [0xb2602bfa]
#9 [0xb25fcb3b]
#10 [0xb25fcb3b]
#11 [0xb25fa219]
#12 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77aa2bc]
#13 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb78beed8]
#14 /home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so [0xb77aa0ef]
#15 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x32d)
[0xb7807b9d]
#16 
/home/simone/programs/jdk1.5.0_15/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d)
[0xb75ae30d]
#17 [0xb26024ab]
#18 [0xb25fca64]
#19 [0xb25fa219]

The splash-screen appears as usual, but after a totally empty window
appears; if I try clicking on it, an exception is thrown:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at 
org.antlr.works.components.grammar.CEditorGrammar.getReferenceAtPosition(Unknown
Source)
        at 
org.antlr.works.components.grammar.CEditorGrammar.getCurrentReference(Unknown
Source)
        at org.antlr.works.editor.EditorMenu.getContextualMenu(Unknown Source)
        at 
org.antlr.works.components.grammar.CEditorGrammar.ateInvokePopUp(Unknown
Source)
        at org.antlr.works.ate.ATEPanel.textPaneInvokePopUp(Unknown Source)
        at 
org.antlr.works.ate.ATEPanel$TextPaneMouseAdapter.checkForPopupTrigger(Unknown
Source)
        at 
org.antlr.works.ate.ATEPanel$TextPaneMouseAdapter.mousePressed(Unknown
Source)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:222)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at 
java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at java.awt.Component.processMouseEvent(Component.java:5514)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)
        at java.awt.Component.processEvent(Component.java:5282)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3984)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3819)
        at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3889)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1791)
        at java.awt.Component.dispatchEvent(Component.java:3819)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Can anyone help me please?
Thanks in advance!
Best regards,
Simone

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