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  Error:  ERROR 000539: Error running expression: rcexec()

【相关信息】
Article ID: 41859
Software:
ArcGIS for Desktop Advanced 10.1, 10.2
ArcGIS for Desktop Standard 10.1, 10.2
ArcGIS for Desktop Basic 10.1, 10.2
Platforms:
Windows XP, Server 2003, Vista, Server 2008, Windows 7, Server 2012, Server 2008 R2

【错误信息】
When running a Python script exported from ModelBuilder that includes a Raster Calculator function, the code fails because it is not able to run the rcexec() expression. The following error message is returned:
"ERROR 000539: Error running expression: rcexec()"

【错误原因】
This error is due to Raster Calculator not being exposed to Python as a tool. Currently, Raster Calculator is only exposed as a geoprocessing tool in ArcGIS or in ModelBuilder. However, there are a number of different ways to use Raster Calculator functions in Python.
2015-11-18 添加评论
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    【解决方案】
    This example shows how Python can use the Spatial Analyst Math toolset to perform mathematic functions on raster datasets, in a stand-alone script that can be run outside of the arcmap process.
    1. Open a Python IDE.
    2. Create a Python script using the Math toolset function.
      Sample using the Minus function: 
    # Name: Minus_Ex_02.py
    
# Description: Subtracts the value of the second input raster from the
    
#              value of the first input raster on a cell-by-cell basis
    
# Requirements: Spatial Analyst Extension
    

    
# Import system modules
    
import arcpy
    
from arcpy import env
    
from arcpy.sa import *
    

    
# Set environment settings
    
env.workspace = "C:/sapyexamples/data"
    

    
# Set local variables
    
inRaster1 = "degs"
    
inRaster2 = "negs"
    

    
# Check out the ArcGIS Spatial Analyst extension license
    
arcpy.CheckOutExtension("Spatial")
    

    
# Execute Minus to subtract inRaster2 from inRaster1
    
outMinus = Minus(inRaster1, inRaster2)
    

    
# Save the output 
    
outMinus.save("C:/sapyexamples/output/outminus.tif")
     
     3. Run the Python script.
    【创建及修改时间】
    Created: 12/9/2013

    Last Modified: 12/9/2013
    【原文链接】
    http://support.esri.com/en/kno ... 41859
    回复时间：2015-11-21 22:14:46 0 0
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    nfc - GISer

    赞同来自:

    Realy? But I successed call Raster Calculator on C# program.
     Operator System is XP sp3,
     ArcGIS 10.1
    How do I understand It？
    回复时间：2016-12-12 15:26:19 0 0
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