Raster Calculator does not work

Discussion created by jeffboyd on Sep 2, 2013
Latest reply on Mar 9, 2017 by ioannidm
When I try to use the raster calculator (in ArcToolBox or as a command tool), I get a runtime error.  The error messages are shown    below.  And yes, I have a license for Spatial Analyst, but I seldom use it, so its quite possible that I am doing something obviously wrong.  The output raster, test02 does not exist yet (I tried pre-creating it, but that didn't work, either).  The input raster is integer, but float rasters are not working for me either.

Raster Calculator [143113_09022013]
Output raster:  <empty>
  Executing: Raster Calculator ??????R31107_G2I??? * 3??? C:\GIS_Data\DEM\NM\test02
  Start Time: Mon Sep 02 14:31:13 2013
  Raster(r???R31107_G2I???) * 3
  X  ERROR 000539: Runtime error
  X  traceback (most recent call last):
  X  File ???C:\Python27\ArcGIS10.1\Lib\, line29,   in_show_warningfile.write(formatwarning(message, category,filename,lineno,line))
X AttributeError: ???geoprocessing sys.stdout object??? object has no attribute ???write???

X  Failed to execute (RasterCalculator)