I am trying to buffer multiple feature classes from a directory but I keep getting the same error message.

[JohnnyMonds]

import arcpy

# Set workspace for listing
arcpy.env.workspace = r"T:\chastain\PrgGIS\World"
# Get a list of all feature classes
fcs = arcpy.ListFeatureClasses("*")
# Loop through the list
for fc in fcs:
#print names
print("These feature classes are in the World folder", fc)
Output = fc + "Buff"
arcpy.Buffer_analysis(fc, Output, "100 Meters")

ERROR 000670: output Output Feature Class is same as input Input Features
Failed to execute (Buffer).

[DavidPike]

Hey you're very welcome Johnny. Two final points:

1. dependant on the buffer distance you may want to consider a "GEODESIC" buffer to preserve true distance.

2. Buffering country sized polyline data is extreeeeeemely processing intensive

[JohnnyMonds]

Ok, update...Found the Country shapefile to be corrupted, thank you for your help. here is my final script

import arcpy,os

# Set workspace for listing
arcpy.env.workspace = r"T:\chastain\PrgGIS\World"
# Get a list of all feature classes
fcs = arcpy.ListFeatureClasses("*")
# Loop through the list
for fc in fcs:
fc_path = os.path.join(arcpy.env.workspace, fc)
#print names
print("These feature classes are in the World folder", fc)
Output = r"C:\Users\johnny.monds\Desktop\Test" +fc[:-4] + "_Buff.shp"
arcpy.Buffer_analysis(fc, Output, "100 Meters", "FULL", "ROUND", "ALL")