Summary
Adds an error message (severity of 2) to the messages of a script tool or Python toolbox tool.
When a tool is run, an error message can be accessed from the Geoprocessing pane, the geoprocessing history, and the list of messages when a tool is called from Python.
Syntax
AddError (message)
Parameter | Explanation | Data Type |
message | The error message. | String |
Code sample
Add an error message to a Python script tool.
import arcpy
fc = arcpy.GetParameterAsText(0)
# Get the count from the GetCount tool's Result object
feature_count = int(arcpy.GetCount_management(fc)[0])
if feature_count == 0:
arcpy.AddError("{0} has no features.".format(fc))
else:
arcpy.AddMessage("{0} has {1} features.".format(fc, feature_count))