[Beginner question] Raster to ASCII

[MRAB]

On 14/11/2010 19:07, Becky Kern wrote:
> Hi users,
> I'm using Python 2.5 (in concert with ArcGIS 9.3) to convert a raster to
> an ASCII file. I used the code (listed below) several weeks ago to
> successfully do the conversion, but when I tried to replicate it a few
> days ago, I got an error message.
> import arcgisscripting
> gp = arcgisscripting.create(9.3)
> InRaster = "C:/data/raster1"
> OutAsciiFile = "C:/data/raster2ascii.asc"
> gp.RasterToASCII_conversion(InRaster, OutAsciiFile)
> The error message:
> arcgisscripting.ExecuteError: Failed to execute. Parameters are not
> valid. raster1 does not exist.
> My file path has not changed so I don't understand why Python can no
> longer recognize my raster file. Any ideas?
>
Just to make sure, does os.path.isfile(InRaster) return True?