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I am in the process of creating a .dwt to be used to generate plan & profile sheets. I have attempted to set the viewport type to either plan or profile (depending on the viewport) but it keeps resetting itself to "undefined". Has anyone seen this before?
A quick search came up with this:
http://forums.autodesk.com/t5/AutoCAD-Civil-3D/VIEWPORT-TYPE/m-p/3416129#M174991
Please be sure to include your version and which, if any, service packs you have installed.
ANd a quick test in C3D2013 with SP1 installed seems to indicate it was corrected.