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Preventing Project_management from Outputting Feature Classes to Map

Question asked by TomFlahive on Apr 6, 2012
Latest reply on Apr 6, 2012 by TomFlahive
I have created a Python script that I run from the Python window of ArcMap which successfully iterates through all the layers on the map and projects the layers to another coordinate system using arcpy.Project_management.  However, after each layer is projected, it is automatically added to the map.  Is there any way to suppress having the new datasets added to the map?  I want to re-project the layers in the map, but I don't want those new feature classes added to the map.