If the .ldb file cannot be deleted it usually means that someone is accessing the database. Are you unable to delete it even with all AutoCAD Electrical PCs turned off. That will be a sure way to determine whether it is a network issue or AutoCAD Electrical, or simply another user accessing the file In fact, I find that with version 2011 the .ldb file appears only temporarily after I click Lookup.
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The AutoCAD Electrical forum has moved into it's very own category page, and can no longer be found within the Additional Product Forums.
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