Error 000865 when using arcpy.ASCIIToRaster_conversion

Question

I don't know what I'm doing wrong. I always get the error 000865 when using arcpy.ASCIIToRaster_conversion. I'm new and do not have much Python experience right now – so sorry for that.

>>> import arcpy
import os
from arcpy import env
env.workspace = r"D:\Julia_T\projekt\erste_schritte\dritter_tag_python\testdaten"
#folder to list
ascFileList = arcpy.ListFiles("*.asc")
for ascFile in ascFileList:
# geoprocessing steps
ascFileName = os.path.splitext(ascFile)[0]
# define the output file
rastFile = ascFileName + "_output.img"
# run the tool
arcpy.ASCIIToRaster_conversion(ascFile,rastFile, "INTEGER")

Runtime error Traceback (most recent call last): File "", line 15, in File "c:\programme\arcgis\desktop10.2\arcpy\arcpy\conversion.py", line 2193, in ASCIIToRaster raise e ExecuteError: ERROR 000865: Eingabe-ASCII-Raster-Datei: 2001002_cloud_free.asc ist nicht vorhanden.

Do I have to use the CatalogPath? I'm working with ArcMap 10.2.1. Thanks

• Paul: Well your error is that the raster is not present. Does ` 2001002_cloud_free.asc` actually exist? It is a valid file that is recognized by Arcmap?
• Paul: Take a look here. Could be a weird bug.
• Erica: The steps under the for loop need to be indented -- is it correct in your script? (Often pasting code into Questions loses spaces.)
• Nora: Yes, it in the script. I gonna try to fix it tomorrow.

Answer 1

The ASCIIToRaster tool is not interpreting the file names correctly, despite you setting the workspace environment. You need to include the full path, so in your case your line should be:

arcpy.ASCIIToRaster_conversion(env.workspace + "\\" + ascFile, env.workspace + "\\" + rastFile, "INTEGER")

Also as @Erica says you should get into the habit of placing print statements in your code to see the actual value of the variables.

Answer 2

Check whether the raster exists by using a print statement, e.g.

for ascFile in ascFileList:
 print ascFile

If that prints a list of .asc files, try rebooting.

If that doesn't work, check that the ASCII file will convert properly by testing just one (in a separate temporary script).

import arcpy
arcpy.ASCIIToRaster_conversion(r"c:\temp2001002円_cloud_free.asc",r"c:\temp\outp‌​ut.img", "INTEGER")

And use the full file path as Hornbydd describes:

for ascFile in ascFileList:
 # define the input file path
 ascFilePath = env.workspace + "\\" + ascFile
 # define the output file
 ascFileName = os.path.splitext(ascFile)[0]
 rastFilePath = env.workspace + "\\" + ascFileName + "_output.img"
 # run the tool
 arcpy.ASCIIToRaster_conversion(ascFile,rastFile, "INTEGER")

• Nora: So I print every step, did restarted the system, but I still get the same ERROR while running the tool. I really don't know what to do.
• Nora: 'print ascFileList #works for ascFile in ascFileList: # geoprocessing steps ascFileName = os.path.splitext (ascFile)[0] print ascFileName #works rastFile = ascFileName + "_output.img" print rastFile #works #run the tool arcpy.ASCIIToRaster_conversion (ascFile, rastFile, "INTEGER") #ERROR 000865'
• Erica: @Nora Try (in a new script, perhaps) running the tool on just one raster with explicit declaration, e.g.: arcpy.ASCIIToRaster_conversion(r"c:\temp2001002円_cloud_free.asc",r"c:\temp\output.img", "INTEGER")
• Nora: it works with just one: ASCII inASCII = r"D:\Julia_T2000067円_cloud_free.asc" outRaster = r"D:\Julia_T\output" rasterType = "INTEGER" arcpy.ASCIIToRaster_conversion(inASCII,outRaster,rasterType)
• Erica: Good, so the raster files are not the problem. Try using the full path as Hornbydd proposes in his answer.