Correct syntax may be one of the following.:<a href="http://arcpy.gp" target="_blank">arcpy.gp</a>.Con_sa("arelev","1","//chipotle2/ESRI_Test/Open/1015017_python/ConPython","0","VALUE < 1840")<a href="http://arcpy.gp" target="_blank">arcpy.gp</a>.Con("arelev","1","//chipotle2/ESRI_Test/Open/1015017_python/ConPython","0","VALUE < 1840")myRaster = <a href="http://arcpy.sa" target="_blank">arcpy.sa</a>.Con("arelev","1","0","VALUE < 1840")