Hi All- I've used the VLAX class successfully numerous times until today. Here's an example of what I'm attempting to do: '****************************************** Dim oVlax As New VLAX Dim lispString As String Dim retval As String lispString = "(command ""circle"" ""0,0"" ""5"")" retval = oVlax.EvalLispExpression(lispString) '****************************************** The resulting Lisp string is: (command "circle" "0,0" "5") This works fine when run in a Lisp program or from the command line. However when evaluated with VLAX it returns error 2000 "invalid AutoCAD command: nil" My actual application does not add a circle - this is just an example using the Lisp command - "command". Any help would be Greatly Appreciated! Thanks, Dale Lundgren