描述

If I open an implementation design in the PlanAhead, then expand Netlist -> Primitives and click on a primitive (LUT6 for example) an internal exception occurs. 

This exception does not occur for all primitives, but appears to be related to primitives shown with a thin blue line through them. 

An error message similar to the following is received:

This report is an indication that an internal PlanAhead error occurred. This information is useful for debugging.
 Please open a case with Xilinx Technical Support with this file and a testcase attached.
 -------------------------------------------------------------------------------
 java.lang.NullPointerException
 at ui.data.floorplan.o.a(SourceFile:275)
 at ui.data.floorplan.o.b(SourceFile:357)
 at ui.data.floorplan.t.b(SourceFile:143)
 at ui.data.floorplan.t.a(SourceFile:47)
 at ui.views.t.a(SourceFile:554)
 at ui.frmwork.v.f(SourceFile:72)
 at ui.frmwork.v.e(SourceFile:46)
 at ui.data.d.b(SourceFile:480)
 at ui.data.d.a(SourceFile:91)
 at ui.utils.aZ.setSelectionPaths(SourceFile:56)
 at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java
 :170)
 at javax.swing.JTree.setSelectionPath(JTree.java:1598)
 ...

解决方案