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This bug was originally marked as duplicate of bug 202707, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.3 Beta 2 (Build 201211062253) VM: Java HotSpot(TM) 64-Bit Server VM, 23.5-b02, Java(TM) SE Runtime Environment, 1.7.0_09-b05 OS: Windows 8 Stacktrace: java.lang.AssertionError at org.netbeans.modules.form.layoutdesign.LayoutOperations.eliminateEndingGaps(LayoutOperations.java:2096) at org.netbeans.modules.form.layoutdesign.LayoutOperations.optimizeGaps2(LayoutOperations.java:1928) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.intervalRemoved(LayoutDesigner.java:4012) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.removeComponentInterval(LayoutDesigner.java:3796) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.restrictedCopy(LayoutDesigner.java:1048) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.endMoving(LayoutDesigner.java:761)
Created attachment 134012 [details] stacktrace
Hi, do you still have the GUI form in a state where this exception can be reproduced? The problem is really specific to certain state and exact operation made, so having a reproducible case is necessary for us to make a fix, we would really appreciate it. Thanks.
Reported for 7.3.x or earlier, no new info since then -> closing as worksforme, please reopen in case you see it.