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When I open an existing UML model the root nodes Model, Diagrams, and Imported Elements are shown. All of them show a + sign indicating there are children. When I click on the Model node nothing happens while there are children. If I add a new element to the Model, the node opens and all existing children are shown.
Created attachment 140806 [details] Added patch for problem Included patch contains fix for problem that locally fixed my issue.
thanks it's a duplicate of issue https://netbeans.org/bugzilla/show_bug.cgi?id=171788 but as this one contain a fix, it may have sense to close https://netbeans.org/bugzilla/show_bug.cgi?id=171788 will try to integrate a bit later or someone else with push permission can try.
pushed http://hg.netbeans.org/community-uml/rev/55780b8b65f1
*** Bug 171788 has been marked as a duplicate of this bug. ***
bug repeats in netbeans 7.4 and 8.0