Convert raster in model builder: unable to open feature

Question

Tried to use model builder to convert several rasters to polygons. Here is the script exported to Python:

# -*- coding: utf-8 -*-
# ---------------------------------------------------------------------------
# convertraster.py
# Created on: 2017-04-24 11:38:52.00000
#   (generated by ArcGIS/ModelBuilder)
# Description: 
# ---------------------------------------------------------------------------

# Import arcpy module
import arcpy

# Load required toolboxes
arcpy.ImportToolbox("Model Functions")

# Local variables:
copiesx = "C:\Documents\GIS\temp\copiesx"
tx_107_tif = "C:\Documents\GIS\temp\copiesx\tx_107.tif"
v_name__shp = "C:\Documents\GIS\temp\shapx\%name%.shp"

# Process: Iterate Rasters
arcpy.IterateRasters_mb(copiesx, "", "", "NOT_RECURSIVE")

# Process: Raster to Polygon
arcpy.RasterToPolygon_conversion(tx_107_tif, v_name__shp, "NO_SIMPLIFY", "Value")

I've restarted ArcMap (10.2. ) several times because the model keeps failing with the following message:

ERROR 010157: Unable to open feature class ... Failed to execute (Raster to Polygon).

I checked the error code. '... This may be due to incorrect paths or lack of permissions to access folders.' Don't think it's that, I know where the files are and made them myself, I have the permissions. It also says that the files could be corrupt, but I can load the files without problem. I executed one Raster to Polygon outside the model and it worked. Any guesses how to get the model to work?

curtvprice · Answer

Make tx107.tif a precondition to the Calculate Value to make sure Name1 gets refreshed for every iteration.

johnpolo · Answer

Curtis,

Thanks for your response. I did as you said. Here are screenshots of the steps.

The model ran. While it ran, it seemed to iterate through all the rasters. However, it only created one polygon, the last one in my list.

curtvprice · Answer

I'm with Dan, it looks an awful lot like a pathname issue, for example if the output model element %Name% contains spaces within an iteration you will see an error message like this as shapefile names can't have spaces, so the feature class (shapefile) can't be created with that pathname. Similarly make sure you are avoiding special characters. An automated fix in Model Builder is to use the Calculate Value tool to make the name legal. Rename the Calculate Value output element to %Name1%, connect it to your Raster To Polygon tool as a precondition, and then, in your output path, replace %Name% with %Name1%. This will convert an ugly name like "z1&.tif" to "z1__tif" that can be safely used for a shapefile name. Expression fix_name(r"%Name%")‍‍‍‍ Code Block def fix_name(nm): return arcpy.ValidateTableName(nm)‍‍‍‍‍‍‍‍