ArcToolbox script will not return values

HenryColgate

Okay most of that stuff in here before was redundant so it seems.

New toolbox, new Script.  No changes made to validation.  No input at all.  Just a straight run of the script does not work.

import arcpy
mxd = arcpy.mapping.MapDocument("current")
arcpy.AddMessage(mxd.title)

Hopefully that is a bit easier to answer cos I reckon I must be missing something really, really simple.

PhilMorefield

arcpy.GetMessages is specific to getting messages from a tool which has executed.
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/GetMessages/000v0000000p000000/

Well, this is a digression, but that link is a bit misleading. You can put whatever you want into a message. For example, if you put this code into a script tool:

import arcpy
arcpy.AddMessage("This is just a message...")
arcpy.AddWarning("This text is green...")
arcpy.AddError("This text is red...")
arcpy.GetMessages()

# this will make the tool bomb out
foo = bar

No tools have executed but you've still returned three messages.