Under Extjs 4, by repeatedly expanding and collapsing nodes or subtrees of a tree panel, some having children, some not, I end up getting the following error Cannot read property 'internalId' of undefined issued by ext-all-debug from method 'updateIndexes'. Did anyone come across it ? Thanks. D.
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I am having the exact same error. How did you solve it? – Dave Apr 25 '13 at 04:55