Hi, here the whole code from a beginner. Nothing happens when I open ArcMap. The symbology from the input layer did not changed.Thanks!import arcpy, sys, traceback, datetime
from arcpy.mapping import *
CUR_DATE = datetime.date.today().strftime('%m.%d.%Y')
try:
datapath = 'C:\\GIS\\Vietnam\\'
mappath = datapath + 'Maps\\' # output for PDFs
mxd = MapDocument(datapath + 'Floodplain.mxd')
#Apply Symbology
#Set layer to apply symbology
inputLayer = "commune_zone.lyr"
#Set layer that output symbology will be based on
symbologyLayer = "commune_zone_Layer1.lyr"
#Apply the symbology from the symbology layer to the input layer
arcpy.ApplySymbologyFromLayer_management(inputLayer, symbologyLayer)
except:
# http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//002z0000000q000000
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = "PYTHON ERRORS:\nTraceback Info:\n" + tbinfo + "\nError Info:\n " + str(sys.exc_type) + ": " + str(sys.exc_value) + "\n"
msgs = "ARCPY ERRORS:\n" + arcpy.GetMessages(2) + "\n"
arcpy.AddError(msgs)
arcpy.AddError(pymsg)
print msgs
print pymsg
arcpy.AddMessage(arcpy.GetMessages(1))
print arcpy.GetMessages(1)
