Discussion created by jmgart on Jul 29, 2011
Latest reply on Jul 29, 2011 by jmgart
MapDocument("CURRENT") returns an error "cannot open map document" if it is not run within an ArcMap session and I understand why.  However, I need to be able to add a layer to the ArcMap TOC from outside the ArcMap application.  How do I best approach that?  Can it be done somehow from python outside an ArcMap session?

mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd, "*")[0]
lyr = arcpy.mapping.Layer(os.path.join(sPath,sFile))
arcpy.mapping.AddLayer(df, lyr, "AUTO_ARRANGE")