Attached is a vi demonstrating a bug I observed in January 2008 with LabVIEW 8.5. Now in LabVIEW 10 I see that this issue still exists. The problem is observed while setting the multicolumn listbox value programatically, in effect selecting a row programatically, and then trying to navigate to a different row in the listbox using the up/down arrow keys. Navigation does not start from the currently selected row. Instead it starts from the row that was selected prior to the programatic change to the multicolumn listbox value.

There is a KB that provides a workaround for the behavior you're seeing. (How Can I Make Persistent Programmatic Changes to the Value of a Listbox Control?) http://digital.ni.com/public.nsf/allkb/61D1AA87092BBC4C86257ED2005B1EC5?OpenDocument

LabVIEW

Multicolumn Listbox Keyboard Navigation Bug

Solved!

The original example shows a way to work around this issue by handing the key events in code

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LabVIEW

Multicolumn Listbox Keyboard Navigation Bug

Re: Multicolumn Listbox Keyboard Navigation Bug